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Avaya Configuring DLSw Services User's Manual

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1. Figure 2 9 DLSw and Source Route Bridging on SRB Circuits DLSw on an Ethernet 802 3 Circuit The router supports DLSw configured on an Ethernet 802 3 circuit The DLSw software provides bridging services between Ethernet 802 3 LAN segments locally attached to the same router The DLSw interface takes precedence over the transparent bridge interface whenever the destination SAP address identified in a TEST frame received from the local circuit already exists in the router s DLSw configuration In this case only the DLSw interface e Captures the locally received TEST frame e Attempts to locate the destination SAP address specified in that frame 2 12 DLSw Implementation Notes The transparent bridge interface on the same circuit with DLSw never sees TEST frames that contain destination SAP addresses intended for DLSw Figure 2 10 However SAP addresses intended for DLSw can be passed from one local Ethernet interface to another through the DLSw software Therefore non DLSw SAPs will be transparently bridged between transparent bridge interfaces while DLSw SAPs will be forwarded between interfaces by DLSw You configure transparent bridge services independent of DLSw services on the router as appropriate for the topology of your network TCP IP Network Ethernet 802 3 Local Ethernet 802 3 Segment Transparently Bridged Segment Path not used for DL
2. Bay Networks Router Figure 1 1 DLSw Single Switch and Dual Switch to Switch Networks 1 4 Data Link Switching Overview DLSw Single Switch Services DLSw single switch services enable the router to perform link level conversion while providing services to ensure session integrity Examples of single switch conversions include e SDLC to Token Ring e SDLC to Frame Relay RFC 1490 e Token Ring to Ethernet e Ethernet to bridged SNA over Frame Relay Single switch configurations provide services to attached devices and networks to ensure session availability including e Local acknowledgment and termination of the LLC2 or SDLC session e 802 5 routing information field RIF caching allowing more than eight source route bridged rings between a local and remote system e MAC address and NetBIOS name caching Figure 1 2 illustrates a sample network using a single Bay Networks router The router can communicate with an IBM front end processor FEP or other LAN gateway Cluster Controller LLC2 Token Ring SNA Processor Ethernet a Frame Relay le LLC 2 dE LLC 2 or SDLE be AE A aaa EA Dedi Aiia a aaia gt Logical Connection Figure 1 2 Bay Networks Single Switch Router Configuring DLSw Services Figure 1 3 illustrates a network using adjacent routers each performing single switch conve
3. For Slot 3 the IP address of the directly attached Frame Relay interface represents this slot in the Slot Table For Slot 4 note that an IP address cannot be assigned to an SDLC interface and no IP address is assigned to the Frame Relay interface Instead the IP address of a Token Ring interface on Slot 1 is used in the Slot Table It is acceptable to use any other IP address existing on this router to represent this slot e Router B a remote site connected to the central site using Frame Relay is a single slot router running single switch DLSw The IP address of the Frame Relay interface represents this slot in the Slot Table 3 7 Configuring DLSw Services e Router C a regional site connected to the central site using multiple links is a single slot router running dual switch DLSw The circuitless IP address represents this slot in the Slot Table Router A 192 32 10 1 LAN NetBIOS Gateway Main Frame Server r t Ge A CH O NetBIOS J Client 192 32 20 1 AS 400 Router B igo 39 302 D 192 32 20 2 Router C L 192 32 30 1 L Frame Relay C S T Frame Relay 192 32 40 1 D 192 32 40 2 Circuitless L 192 32 200 1 3 w
4. Table B 1 Predefined Outbound Filter Criteria Based on DLSw Header Packet Type or Component Predefined Criteria Any MAC Source Address MAC Destination Address DSAP SSAP FID4 FID Type Network Priority Trans Priority Dest Subarea Address Origin Subarea Address Expedited Flow Indicator Destination Element Origin Element User Defined FID2 FID Type EFI Expedited Flow Indicator Destination Element DAF Destination Address Field OAF Origin Address Field User Defined See the Specifying MAC Address Ranges section later in this appendix 2 See the Specifying Source and Destination SAP Code Ranges section DLSw Reference Points Tables B 2 and B 3 list the predefined DLSw reference points for outbound traffic filters based on the SNA Transmission Header B 2 Criteria for DLSw Prioritization Table B 2 DLSw Reference Points for FID2 Frames Criteria FID2 Reference Point Offset bits Length bits Format Identifier FID SNA_START 0 4 Expedited Flow Indicator EFI SNA START 7 1 Destination Address Field SNA START 16 8 DAF Origin Address Field OAF SNA START 24 8 Table B 3 DLSw Reference Points for FID4 Frames Criteria FID4 Reference Point Offset bits Length bits Format Identifier FID SNA_START 0 4 Network Priority SNA_START 7 1 Transmission Priority Field SN
5. Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Canureach Timer 30s 0 to 3600 Specifies the time interval in seconds after which the router sends a canureach message to the remote DLSw peer to establish a session Enter the number of seconds you want for the time interval For example type a 1 to transmit a canureach message once per second or type 3600 to transmit the message once per hour Type a 0 if you do not want to transmit a canureach message 1 3 6 1 4 1 18 3 5 1 5 12 1 11 Canureach Retries 4294967295 0 to 4294967295 Specifies the number of times a canureach message is sent to the remote DLSw peer to establish a session Type the number of retries you want Type a 0 if you do not want to transmit canureach messages Leave the default value 4294967295 to send an infinite number of canureach messages for this connection 1 3 6 1 4 1 18 3 5 1 5 12 1 12 Link Station Timer 30s 0 to 3600 Sets the time interval in seconds after which the router sends a connect request to the local SDLC device to establish a session Enter the number of seconds you want for the time interval For example type a 1 to send a connect request once a second or type 3600 to send a connect request once an hour Type a 0 if you do not want to send connect requests 1 3 6 1 4 1 18 3 5 1 5 12 1 13 5 52 Parameter Default Range Function Instructions MI
6. 2 Click on OK This enables the DLSw global parameters 4 2 Enabling DLSw Services Enable TEF Warrjou Sine IP Virtual King Mas Sirt Dees Virtual Ring ATL Mar Cache Ape ethics Cache Gs Reject hunf igure Peers Krepal Lwe Time Oecd Hasim Peckege Fire Figure 4 1 DLSw Global Parameters Window Parameter IP Virtual Ring Default None Range 1 to 4095 Function Specifies a virtual ring number for the TCP IP network cloud Instructions Enter any valid ring number The number should match the ring number chosen by other DLSw peers on the same network cloud Make sure that the number is unique among any other Ring IDs Group LAN IDs or Internal LAN IDs assigned in the network MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 1 5 4 3 Configuring DLSw Services Note The IP Virtual Ring and Virtual Ring MTU parameters that appear in the DLSw Global Parameters window are primarily for compatibility with SRB networks locally attached to the router However Site Manager requires you to enter a value for the IP Virtual Ring even if you are configuring DLSw services on non SRB segments locally attached to the same router Specifying Source Routing Bridge Encapsulation The Source Route Encapsulation dialogue box Figure 4 2 allows you to specify the type of encapsulation formats to be used on Ethernet 802 3 and Frame Relay interfaces running DLSw Click on Cancel if you are configuring standard LLC2 over Ethernet
7. Figure 2 8 Figure 2 9 Figure 2 10 Figure 2 11 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 3 5 Figure 4 1 Figure 4 2 Figure 4 3 Figures D Gw Single Switch and Dual Switch to Switch Networks 06 1 4 Bay Networks Single Switch Router iese se se ee ek GR ee ee 1 5 Bay Networks Adjacent Single Switch Routers iss se de ee ee 1 6 DLSw Dual Switch Services for SNA Devices on LANS sees see 1 7 SDLC Conversion in a Single Switch Configuration ees ee ee 1 9 SDLC Conversion in a Dual Switch to Switch Configuration iese 1 10 Sample Frame Relay Network 1 12 Maximum Ring and Bridge Hop Counts in a Source Routing Network 2 2 DLSw Capable Routers on an IP Backbone iii ees se AR n 2 3 DLSw Peers Using an IP Virtual Ring iii see ee ee RR ee Re ee 2 4 Counting the IP Virtual Ring ees se ee ee AR AA AA Re ee ee AA ee ee 2 6 Router Logical Considerations for DLSw Support de de Re ee 2 7 End to End Path in a DLSw capable Token Ring 802 5 Network 2 9 DLSw Services in Parallel with a Transparent Bridge iese ee 2 10 DLSw Services in Parallel with a Source Routing Bridge eise eie 2 10 DLSw and Source Route Bridging on SRB Circuits iese se ee 2 12 DLSw and Transparent Bridging on Ethernet 802 3 Circuits iese 2 13 Translation Bridge Services iese ee de ee AA ee ee RA ee ee ee 2 14 DLSw Configuration Seguence for Token R
8. iese ee ee ee AA ee ee 4 12 SDLC Line Parameters Window 4 14 Select Protocols Wimdow ii ee ee AA Ee AR RA AA RA ee RA ee 4 16 DLS Local Device Configuration WindOW 4 17 Local Device Configuration WindOW i iese ee Ge AA ee ee ee 4 18 Configuration Manager WindOW cece ee ee AR RA Re GR ee 5 3 Edit DLSw Global Parameters Window iese sesse ee ek de RR ee AR ee 5 4 DLSw Interface Configuration WiNdOW iese ee ee Re ee ee 5 13 Circuit List WindOW ee ee AA AA RA ee RA ee Re ee 5 15 Edit Connector WindOW ui iese ee ek AA Re RA AA Ge AR Re Ge AA ee 5 15 Circuit Definition WiINdOW ee ee ee RA AR RA ee RA ee ke ee 5 16 Edit DLSw Interface Window iese ee ee RA AA Ge AR Re Ge AA ee ee 5 16 Configured Peer in DLSw Peer Configuration Window ees see ee 5 18 IP Address in DLSw Peer Configuration Window s 5 19 Deleting a DLSw Peer IP Table Entry 5 20 DLSw Slot Configuration Window 5 22 IP Address in DLSw Slot Configuration Window n 5 22 Saving an Edited D Gw Slot IP Address se ee ee ke ee ee RR Re ee ee n 5 24 Deleting a DLSw Slot Table Entry 5 25 SAP Addresses in DLSw SAP Configuration Window ees see see ee 5 27 SAP Parameter in DLSw SAP Configuration Window s s s 5 27 Saving the Edited SAP Window Setting eee eee se ee ee 5 30 Deleting a SAP Table Entry 0 cceececeeeseeeeeeneeeeeeeeeesaaeeseeeeeeeeaaeeneneeess 5 32 DLSw NetBIOS Peer Configuration Win
9. Frame Relay EE Circuitless 192 32 100 1 Front End SDLC Pocesser Control Unit Router B Router A Router C Slot Table Slot Table Slot Table 1 192 32 30 2 1 192 32 100 1 1 192 32 200 1 3 192 32 30 1 4 192 32 10 1 Figure 3 4 Sample Network with Slot Table Definitions You enter slot information in the DLSw Slot IP Table during the initial configuration procedure Refer to Chapter 5 for more information about accessing and editing the DLSw Slot IP Table Configuration Objects for Dual Switch DLSw This section describes the objects you define when you configure DLSw dual switch services on the router specifically DLSw peers 3 8 DLSw Configuration Overview DLSw Peer IP Table Data Link Switches that connect to the same TCP IP network are called DLSw peers on that network On Bay Networks routers each slot that you configure with DLSw services functions as an independent DLSw peer Other vendors may offer RFC 1434 compliant products that support either single or multiple DLSw peers internally For example each IBM 6611 processor in your network serves as a single DLSw peer that you must define on the router TCP IP sessions between DLSw peers are used to exchange information between devices attached to each peer In each router you can define a list of peers in remote routers with which a DLSw session can be initiated These are called configured peers and are defined in the DLSw Peer IP Table Y
10. Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Protocol Priority Disabled Enabled Disabled Toggles protocol prioritization on and off for this peer If you set this parameter to Disable priority filters will be disabled on this peer Setting this parameter to Disable is useful if you want to temporarily disable protocol priority but leave the outbound filters in place Set to Disable if you want to temporarily disable all protocol prioritization activity on this peer Set to Enable if you previously disabled protocol prioritization on this peer and now want to re enable it 1 3 6 1 4 1 18 3 5 1 5 5 1 5 Max Queue Buffers 50 10 to 2147483647 packets Specifies the maximum number of packets in each of this peer s queues Enter a number of packets to increase or decrease the default buffer size of 50 packets 1 3 6 1 4 1 18 3 5 1 5 5 1 6 6 21 Configuring DLSw Services Parameter Max Queue Size Default 16000 Range 5000 to 2147483647 bytes Function Specifies the maximum size of each of this peer s queues Instructions Enter a number of bytes to increase or decrease the default queue size of 16000 bytes MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 5 1 7 Creating DLSw Priority Filters Outbound traffic filters configured with the queue action priority filters determine which DLSw traffic is processed into priority queues To confi
11. LAN Gateway Main Frame ce i 7 E CO CH 192 32 20 1 NetBIOS Server E NetBIOS Client AS 400 Router B D 192 32 20 2 Router C C L Frame Relay N me 192 32 40 1 D 192 32 40 2 Circuitless L 192 32 200 1 S w Frame Relay Freres 192 32 100 1 Front End SDLC LJ Pocesser Control Unt Router B Router A Router C SAP Table SAP Table SAP Table OxFO 0x00 0x04 Figure 3 3 Sample Network with SAP Table Definitions Refer to Chapter 5 for more information about accessing and editing the DLSw SAP Table DLSw Slot Table Each slot on a Bay Networks router running DLSw acts as an independent data link switch Each slot is identified by assigning a unique IP address for the slot This mapping is done in the DLSw Slot Table Each entry in the table consists of a DLSw slot number plus the address of the IP interface you allocate for that slot The router uses this IP address to establish the TCP sessions between peers in a DLSw network Generally the IP address that you select is either the circuitless IP address or the IP address of any interface on this slot However it is acceptable to use the IP address of any interface on any slot 3 6 DLSw Configuration Overview If a
12. 2 9 counting DLSw bridge 2 7 counting internal LANS 2 7 counting SRB LANs and bridges 2 2 to 2 3 internal LANS 2 6 to 2 7 IP virtual rings 2 3 to 2 6 Sync Line Coding parameter 4 15 Synchronous parameters Cable Type 4 16 Clock Source 4 14 Internal Clock Speed 4 15 RTS Enable 4 16 Sync Line Coding 4 15 T TCP Window Size parameter 5 6 TCP IP DLSw communications over 1 6 to 1 7 Technician Interface 5 1 Template Or file editing 6 31 sample 6 24 6 31 templates changing after applying to a filter 6 25 sample 6 24 TEST frames 2 12 Token Ring to Ethernet topology considerations 5 9 traffic filter criteria B 1 to B 6 traffic filters 5 54 DLSw and outbound 1 13 outbound Create Filter window 6 28 creating DLSw templates 6 24 DLSw interfaces 6 22 DLSw Priority Outbound Filters window 6 23 Index 6 Filter Template Management window 6 24 media and protocols supported 6 1 Queue Number window 6 27 translation bridge support 2 13 transparent bridge support 2 12 U unconfigured peers 3 10 V virtual ring 2 3 to 2 6 Virtual Ring MTU parameter 2 5 4 4 5 7 5 8 5 9 W weighted dequeuing algorithm 6 5 window size SAP 5 31 World Wide Web Bay Networks Home Page on xix X XID Format parameter 4 21 5 49 Index 7
13. 4 1 18 3 5 1 5 12 1 11 4 23 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Canureach Retries 4294967295 0 to 4294967295 Specifies the number of times a canureach message is sent to the remote DLSw peer to establish a session Enter the number of retries you want Enter 0 if you do not want to transmit canureach messages Leave the default value 4294967295 to send an infinite number of canureach messages for this connection 1 3 6 1 4 1 18 3 5 1 5 12 1 12 Link Station Timer 30 seconds 0 to 3600 Sets the time interval in seconds after which the router sends a connect request to the local SDLC device to establish a session Enter the number of seconds you want for the time interval For example enter 1 to send a connect request once a second or enter 3600 to send a connect request once an hour Enter 0 if you do not want to send connect requests 1 3 6 1 4 1 18 3 5 1 5 12 1 13 Link Station Retries 4294967295 0 to 4294967295 Specifies the maximum number of times that a connect request is sent to the local SDLC device to establish a session Enter the number of retries you want Enter 0 if you do not want to send connect requests Leave the default value 4294967295 to send an infinite number of connect re
14. Circuit 5 14 Editing DLSw Parameters Configuration Mode local SNMP Agent LOCAL FILE Circuits Delete Figure 5 4 Circuit List Window Edit Circuit Edit Line Figure 5 5 Edit Connector Window In either case the Circuit Definition window appears Figure 5 6 Follow these steps to enable or disable a DLSw interface 5 15 Configuring DLSw Services FEE I II Configuration Mode local SHEP Agent LOCAL FILE Peatarnlss diet Figure 5 6 Circuit Definition Window 1 Select Protocols2DLSw 2lInterfaces The Edit DLSw Interface window appears Figure 5 7 OK Values Help Enable ENABLE Figure 5 7 Edit DLSw Interface Window 5 16 Editing DLSw Parameters 2 Click on Values and select Enable or Disable 3 If you are editing an SDLC circuit edit the Mode parameter by clicking on Values and selecting Primary or Secondary for the type of SDLC link station in this configuration 4 Click on OK This closes the Edit DLSw Interface window and the Circuit Definition window reappears Figure 5 6 5 Select File gt Exit The result of Step 5 depends on how you originally accessed the DLSw Interface Enable parameter e If you selected Circuits Edit Circuits from the Configuration Manager window the Circuit List window appears refer to Figure 5 4 Clicking on Done in the Circuit List window completes the procedure and returns you to the Configuration
15. Configuring DLSw Services Host NCP Version 7 1 or later Frame Relay Network II l Single Switch DLSw DLSw Bay Networks Router Client Bay Networks Router Token Ring Figure 1 7 Sample Frame Relay Network For more information on LLC2 over Frame Relay refer to Configuring LLC Services Data Link Switching Overview DLSw Filtering Bay Networks provides three filtering mechanisms that affect DLSw traffic e Inbound traffic filters e DLSw prioritization e Protocol prioritization Inbound Traffic Filters DLSw supports inbound traffic filtering You can establish filters associated with any remote DLSw TCP port The filters allow the router to e Drop a packet e Log a packet e Forward a packet to a specific address outbound to TCP For DLSw services e Actions other than LOG apply only to broadcast frames sent over the TCP IP network For more information on how to access and configure traffic filters for DLSw services refer to Configuring Traffic Filters and Protocol Prioritization DLSw Prioritization DLSw prioritization allows you to prioritize traffic within DLSw based on predefined or user defined fields Examples of DLSw prioritization criteria include e Source and destination SAP this field can be used to assign NetBIOS traffic SAP OXxFO to a lower priority than SNA tr
16. N negotiable link stations 1 8 NetBIOS sample template 6 31 NetBIOS Cache Age parameter 5 9 NetBIOS Name parameter 5 35 NetBIOS Peer IP Address parameter 5 35 NetBIOS sample template 6 24 P packaging 2 18 configuring 5 12 Packaging Threshold parameter 5 12 Packaging Timeout parameter 5 12 parallel data paths avoiding 2 9 in SRB topology 2 10 in transparent bridge topology 2 9 peer IP address 3 9 Peer IP Address parameter 4 11 5 19 peer DLSw configuring queues 6 15 defined 3 9 enabling protocol prioritization 6 11 peers configured 5 1 defined 3 9 learning mechanism 3 15 multiple 2 11 performance considerations 2 18 DLSw packaging 2 18 PP for Unconfigured Peers parameter 6 13 primary link stations 1 8 priority queues See queues priority protocol prioritization 1 13 5 54 clipped packets 6 7 Default Queue Bandwidths parameter 6 14 defined 6 1 described 6 1 DLSw 6 1 to 6 31 accessing 6 9 6 30 Add Queue window 6 17 Create Filter window 6 28 dequeuing 6 4 DLSw Priority Outbound Filters window 6 23 Filter Template Management window 6 24 Global DLSw PP Parameters Defaults Window 6 10 how it works 6 3 Peer Queue Configuration window 6 16 Queue Number window 6 27 selecting an action 6 27 selecting criteria 6 26 Max Queue Buffers for Unconfig Peers parameter 6 14 Max Queue Buffers parameter 6 21 Max Queue Size for Unconfig Peers parameter 6 14 Max
17. Parameter Default Range Function Instructions MIB Object ID TCP Window Size 8000 octets 5000 to 64000 octets Specifies in octets the maximum amount of DLSw data that the local and remote TCP entities can send before requiring an acknowledgment or can receive before acknowledging Type in any valid number of octets If the TCP Window Size value for DLSw services is less than the global TCP Max Window value DLSw uses its own TCP Window Size If the TCP Window Size for DLSw services is greater than the global TCP Max Window size Site Manager prompts you to make one of the following choices e Increase the global TCP Max Window size to the TCP Window Size set for DLSw services e Accept the global TCP Max Window size as the TCP Window Size for DLSw services on the router 1 3 6 1 4 1 18 3 5 1 5 1 4 Note The default value is based on both NetBIOS and SNA traffic NetBIOS can have frame size up to 4 KB but the default virtual ring MTU limits the frame size on the TCP IP network to 2 KB unless changed SNA uses small frames so this window size can be smaller with SNA only environments than in environments which include NetBIOS traffic Keep the window as small as possible This allows the best most consistent response time when packets are not excessively queued in TCP Selection of this parameter depends on the WAN speed and frame size distribution 5 6 Editing DLSw Parameters Parameter IP Vir
18. Protocols gt DLSw gt Global The Edit DLSw Global Parameters window appears Figure 5 2 5 3 Configuring DLSw Services Enable TEF Mincow Sine IP Wirtial Bim Max lat Sessions Virtual Ring ATU Mar Cache Ape fetHios Cache Age Reject Uncool igured Peers Krepal Lwe Time Jerch May tg Package Soe Figure 5 2 Edit DLSw Global Parameters Window 2 Edit the parameters you want to change 3 Click on OK This saves your changes and returns you to the Configuration Manager window DLSw Global Parameter Descriptions This section describes the DLSw global parameters that you can customize from the Edit DLSw Global Parameters window 5 4 Parameter Default Options Function Instructions MIB Object ID Editing DLSw Parameters Enable Enable Enable Disable Globally enables or disables the system software mechanisms that allow you to add DLSw interfaces to the node configuration Disable Switches every DLSw interface enabled on the router to the disabled inactive state Enable Reinitializes every DLSw interface on the router based on e The current setting of the associated Enable parameter e The current state of the associated circuit Select Disable to switch every DLSw interface existing on the node to the inactive state Select Enable to globally reinitialize all DLSw interfaces configured on the node 1 3 6 1 4 1 18 3 5 1 5 1 2 5 5 Configuring DLSw Services
19. any percentage between 0 and 99 to subsequent queues as long as the combined bandwidth for all queues totals 100 percent On low speed lines running NetBIOS you should allocate 20 of the total bandwidth due to endstation timing 7 Click on OK The Add Edit Delete Queues window reappears 8 Continue to add queues until the total bandwidth is 100 percent Repeat Steps 3 through 7 until the total bandwidth is 100 percent Figure 6 12 shows a sample screen after adding queues IP Geck d d IP dirii isi UNC ti P kri dd d d Figure 6 12 Configured Queues 9 Click on Done 6 18 Using DLSw Prioritization The Peer Queue Configuration window reappears Figure 6 13 This time two of the DLSw peers use peer specific queues and two use the default queue configuration Dione rim Uira Wess Defend t Queues Herrie ict Amp Ly Yalues i Helpi Protocol Priority Hes Duram Buffers Haw Queue Size Figure 6 13 Peer Queue Configuration Window with Both Default and Peer Specific Configurations Enabling or Disabling a Single Peer s Priority Queues You can enable or disable the queues you configured for an individual DLSw peer using the Peer Queue window Note Once you enable priority queues using the Peer Queue Configuration window you must use that window to disable that peer s queues You cannot disable queues that are already active from the Global DLSw PP Parameters Default window 1 Fro
20. dedicating more memory and processing resources to DLSw interfaces running on the router If possible estimate the maximum number of LLC2 sessions that each DLSw peer slot may need to support concurrently Type a number that e Meets session support requirements for DLSw services provided on any slot of the router e Allows a balance between the number of sessions supported for DLSw services on a slot and the amount of resources remaining for other protocols configured on the same slot 1 3 6 1 4 1 18 3 5 1 5 1 8 Virtual Ring MTU 1500 bytes Any number of bytes equal to or greater than 1 Specifies a Maximum Transmission Unit MTU size for frames sent from local LAN attached systems to systems on remote LANs The smallest MTU size supported among all remote LANs in your configuration determines the maximum value of the Virtual Ring MTU parameter for the local router Type in any number of bytes equal to or greater than 1 Entering a new value or accepting the default value for this mandatory parameter helps to prepare endstations for the MTUs of remote LANs 1 3 6 1 4 1 18 3 5 1 5 1 10 5 8 Editing DLSw Parameters Note Ethernet networks support a Maximum Transmission Unit MTU size of 1500 bytes while Token Ring networks support much larger MTUs When configuring DLSw for local Token Ring to Ethernet translation bridge topologies the Virtual Ring MTU parameter should not exceed 1500 This sets the Token Ring MTU size
21. ee ee ee A 1 DLSw Interface Parameters uses ees ee ee ee ee ee ee ee ee ee RR Re ee ee ee ee ee A 2 DLSw Peer IP Table Parameters iese see ee ee ee ee ee ee Ee Re Re ee ee ee ee ee A 2 DLSw Protocol Prioritization Parameters iese esse es se se ee ee ee ee ee ee A 2 DLSw Slot IP Table Parameters sesse see ee ee ee ee ee Ee RR Re ee ee ee ee ee A 3 DLSw SAP Parameters ccccccccccccceccecsesseseeaaececeeeeeeceseseseeeseaaeseeeeeeess A 3 DLSw Default NetBIOS Peer IP Table Parameters cc csccccceseeeeees A 3 DLSw Default MAC Peer IP Table Parameters ccccsscesceeeeeeeeeees A 3 DLSw Local Devices Parameters cccccsecsecceceeeeeeeeecsesseaeeeseeeeeesens A 4 Predefined Outbound Filter Criteria Based on D Gw Header ee B 2 DLSw Reference Points for FID2 Frames iese sesse ese ss se ee ee ee ee ee ee B 3 DLSw Reference Points for FID4 Frames iese sesse es ss se ee ee ee ee ee B 3 Format for Specifying Source Routing MAC Addresses ss see B 4 Functional MAC Addresses ee ee ER ee ee ee ee RR Re ee ee ee ee B 5 SAP GOdES SA LR Bete ER DR e Bade nai wa ee B 6 XV Audience About This Guide This guide describes how to customize Bay Networks router software for Data Link Switching DLSw services The guide provides An overview of DLSw services on the router Chapter 1 Implementation notes that may affect how you configure DLSw services
22. end to end connection path includes an SRB and a non SRB LAN In such cases do not exceed the maximum number of SRB LAN and bridge elements allowed on the SRB LAN side of the connection path Parallel Data Paths If a valid bridging path already exists between two LANs do not configure a parallel DLSw connection path between the same two LANs Figures 2 7 and 2 8 Parallel data paths allow frames to traverse the LANs twice which in turn may confuse systems on the associated LAN segments 2 9 Configuring DLSw Services Token Ring 802 5 Ethernet 802 3 Ethernet 802 3 LAN Segment Frames LAN Segment S Transparent Bridge Lo Router TCP IP Network Lo Router Frames Figure 2 7 DLSw Services in Parallel with a Transparent Bridge Token Ring 802 5 LAN Segment Frames LAN Segment ww SR Source Routing Bridge EL Ce TCP IP ECL Router Network Router Frames Figure 2 8 DLSw Services in Parallel with a Source Routing Bridge 2 10 DLSw Implementation Notes Multiple DLSw Peers on a LAN You can configure two or more DLSw nodes on the same SRB LAN With this configuration each DLSw peer reaches a different set of remote NetBIOS and SNA systems In this case e Do not define a TCP connection between the
23. for use by any third party Neither title nor ownership to Software passes to licensee Licensee shall not provide or otherwise make available any Software in whole or in part in any form to any third party Third parties do not include consultants subcontractors or agents of licensee who have licensee s permission to use the Software at licensee s facility and who have agreed in writing to use the Software only in accordance with the restrictions of this license Third party owners from whom Bay Networks has acquired license rights to software that is incorporated into Bay Networks products shall have the right to enforce the provisions of this license against licensee Licensee shall not remove or obscure any copyright patent trademark trade secret or similar intellectual property or restricted rights notice within or affixed to any Software and shall reproduce and affix such notice on any backup copy of Software or copies of software resulting from modification or combination performed by licensee as permitted by this license Bay Networks Inc 4401 Great America Parkway Santa Clara CA 95054 8 Federal Street Billerica MA 01821 Bay Networks Software License continued 10 11 12 Licensee shall not reverse assemble reverse compile or in any way reverse engineer the Software Note For licensees in the European Community the Software Directive dated 14 May 1991 as may be amended from time to time sha
24. link station which is how SDLC sees the local device Site Manager assigns several default parameter values to the link station For information on how to access and change the link station parameters see Configuring SDLC Services Once you add local devices you can access and change the local device parameters as described in Chapter 5 Optional Configuration Objects Bay Networks routers in your network learn about the locations of remote NetBIOS and SNA systems that are accessible through DLSw services in two ways Through a dynamic process where DLSw inspects incoming frames to learn the location of remote endstations Through static definitions where the network administrator defines the location of NetBIOS and SNA systems attached to remote LANs Static definitions are never required but may be used to reduce the amount of broadcast messages traversing the network Dynamically Learned Remote Systems Bay Networks routers cache dynamically learn the MAC address and NetBIOS name of remote systems 3 15 Configuring DLSw Services Local Bay Networks routers receive frames that contain information about the location that is the DLSw peer IP address of each remote system that uses DLSw services This information is learned from broadcast frames TESTs XIDs and NetBIOS generated by the remote endstations or applications The router stores this information in separate NetBIOS and MAC caches The router uses the learn
25. link station address from 0x01 to OxFE Function Specifies the address of the link station Instructions Type Ox followed by the link station address MIB ObjectID N A 4 18 Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Enabling DLSw Services Disable Enable Enable Disable Enables or disables the DLSw local device Set to Disable if you want to temporarily disable the local device rather than delete it Set to Enable if you want to reinitialize the local device 1 3 6 1 4 1 18 3 5 1 5 12 1 2 PU Name None Any valid 8 byte ASCII name Specifies the name of the adjacent link station This name uniquely identifies the station for statistics and Alert messages Enter the 8 byte ASCII link station name 1 3 6 1 4 1 18 3 5 1 7 5 1 32 PU Type None T2 0 T2 1 Specifies the type of the XID sending node This parameter is used with the IDBLOCK IDNUM and XID Format parameters to determine the station exchange identification XID value Choose either T2 0 or T2 1 N A 4 19 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID IDBLOCK None 017 1061 any other 3 digit hexadecimal valu
26. many routers quick notification of a failed router or link is necessary However when some routers use a low Max Retransmission Timeout parameter setting other routers using the default setting may cause inconsistent results This means that some of the routers time out and report the lost TCP connections quickly while other routers using the default setting may take up to 20 minutes The Max Retransmission Timeout default setting is 240000 ms 4 minutes yielding a default time for learning of a lost TCP connection to approximately 20 minutes Refer to Configuring TCP Services for information on editing the Max Retransmission Timeout parameter setting Flow Control DLSw uses the following two flow control mechanisms to provide reliable end to end delivery of packets e LLC2 flow control e TCP flow control TCP and LLC2 continue to assert flow control until congestion clears on a given TCP connection The default settings for system parameters relevant to LLC2 and TCP flow control are suitable for the majority of your DLSw service requirements 2 16 DLSw Implementation Notes LLC2 Flow Control The LLC2 protocol interface provides a bidirectional window mechanism and a SAP credit allocation mechanism that together manage flow control on individual LLC2 connections between the router and LAN attached SNA or NetBIOS systems The SAP window attempts to limit the number of outstanding frames queued for transmission to a remo
27. or if you are configuring Frame Relay using the RFC 1490 Routing Standard Click on OK if you want to configure Bay Networks proprietary SRB over Ethernet or Frame Relay using the RFC 1490 Bridging Standard Site Manager Figure 4 2 Source Route Encapsulation Dialogue Box Adding Source Routing Parameters When you add DLSw to a Token Ring circuit you first set the source routing global parameters If you have not yet enabled source routing on any circuit the first window to appear is the Source Routing Global Parameters window If you have enabled source routing on some other circuit the first window to appear is the Source Routing Interface Parameters window See Configuring Bridging Services for detailed information on configuring the necessary source routing parameters The Ethernet configuration does not require the source routing steps 4 4 Enabling DLSw Services Mapping Frame Relay Addresses If you are configuring a Frame Relay circuit without SRB the LLC2 Frame Relay Mappings window appears Figure 4 3 Add Delete Apply Values Help Remote MAC Local MAC Figure 4 3 LLC2 Frame Relay Mappings Window 1 Select Add The LLC2 Frame Relay Mapping Add window appears Figure 4 4 4 5 Configuring DLSw Services Figure 4 4 LLC2 Frame Relay Mapping Add Window Specify the DLCI Remote MAC and Local MAC parameters as follows Click on OK The Configuration Manager returns to
28. or server you want to reach via DLSw services 3 Type the IP address of the remote DLSw peer This is the IP address of the DLSw peer that can reach the NetBIOS client or server you identified with the NetBIOS Name parameter 4 Click on OK This saves your entry to the router configuration file The DLSw NetBIOS Peer Configuration window reappears with the new entry in the list of existing NetBIOS peers refer to Figure 5 19 Following are descriptions of the NetBIOS Name and NetBIOS Peer IP Address parameters 5 34 Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Editing DLSw Parameters NetBIOS Name None Any valid NetBIOS name Specifies the name of the remote NetBIOS client server or application you want to reach via DLSw services Enter the name of the remote NetBIOS client or server station or application you want to reach via DLSw services 1 3 6 1 4 1 18 3 5 1 5 11 1 2 NetBIOS Peer IP Address None Any valid 32 bit IP address in the form network host using dotted decimal notation Specifies the IP address of the DLSw peer that can reach the remote NetBIOS client server or application named in the same DLSw Default NetBIOS Peer IP Table entry Enter the IP address of the DLSw peer that can reach the remote client or server Station or application named in the same DLSw Default NetBIOS Peer IP Ta
29. receive broadcast frames from another router However unconfigured peers on a remote Bay Networks router can both receive and respond to broadcast frames that the configured peer in that router forwards internally When a local DLSw peer Bay Networks or otherwise receives a broadcast response from an unconfigured peer on a Bay Networks router the local peer opens a DLSw connection to the unconfigured peer Figure 3 5 shows the sample network of three routers running DLSw This network uses the following Peer IP Table entries e Router A s Peer IP Table has a single entry as follows The DLSw single switch communication with Router B does not require an entry in the Peer IP Table The connection to Router C uses dual switch DLSw An entry is required in the Peer IP Table so that Router A can forward DLSw broadcasts to Router C The circuitless IP address of Router C 192 32 200 1 is entered into Router A s Peer IP Table since this value is the only value in Router C s Slot Table e Router B communicates to Router A via a single switch connection No Peer IP Table is required for Router B e Router C communicates with Router A using dual switch mode The circuitless IP address of Router A 192 32 100 1 is entered into Router C s Peer IP Table However you can use any IP address in Router A s Slot Table instead of the circuitless IP address When using dual switch mode DLSw is not configured on the links between t
30. the local router Each entry you define in the Default NetBIOS Peer IP Table associates the name of a NetBIOS client or server with the IP address of the remote DLSw peer that can reach that client or server You add edit and delete Default NetBIOS Peer IP Table entries in the DLSw NetBIOS Peer Configuration window To access the DLSw NetBIOS Peer Configuration window begin at the Configuration Manager window and select Protocols gt DLSw Default NetBIOS The DLSw NetBIOS Peer Configuration window appears Figure 5 19 showing a list of NetBIOS client and server names 5 32 Editing DLSw Parameters DLSw NetBIOS Peer Configuration Find H a Add Delete Apply Values Help DEN Default NetBios Peer IP Address 198 42 61 5 le Figure 5 19 DLSw NetBIOS Peer Configuration Window Clicking on a name in the list window causes the DLSw Peer IP address associated with that name to appear in the Default NetBIOS Peer IP Address parameter window Figure 5 19 Adding a DLSw Default NetBIOS Peer IP Table Entry To add a new DLSw Default NetBIOS Peer IP Table entry from the DLSw NetBIOS Peer Configuration window Figure 5 19 1 Click on Add The DLSw NetBIOS Configuration window appears Figure 5 20 5 33 Configuring DLSw Services Met HITS Hame Mrt RIDE Peer Jp Frdrers Figure 5 20 DLSw NetBIOS Configuration Window 2 Type the name of the remote NetBIOS client or server This is the client
31. the Token Ring or Ethernet host the local device will reach via SDLC services Consult your host system manager for the host MAC address then type the 12 digit hexadecimal address 1 3 6 1 4 1 18 3 5 1 5 12 1 8 5 50 Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Editing DLSw Parameters Destination Host SAP hex 0x4 0x01 to OxFE Identifies with the Destination MAC the Token Ring or Ethernet host the local device will reach via SDLC services Consult your host system manager for the host SAP address Type Ox followed by a 1 digit or 2 digit hexadecimal address 1 3 6 1 4 1 18 3 5 1 5 12 1 9 MAXOUT 7 1 to 127 Controls the maximum number of consecutive frames that an SDLC link station can send without acknowledgment Type a value from 1 to 127 1 3 6 1 4 1 18 3 5 1 7 5 1 10 MAXDATA 2057 265 521 1033 2057 Specifies the maximum frame size SDLC supports This value includes the Transmission Header TH and Request Header RH Enter a maximum frame size that is equal to or larger than the largest frame size that will be received 1 3 6 1 4 1 18 3 5 1 7 5 1 7 5 51 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function
32. the others If you want to edit the other parameters see Chapter 5 Editing DLSw Parameters Appendix A provides a quick reference to the default DLSw parameter settings You may want to review these settings before editing your DLSw configuration Enabling DLSw on an Interface To enable DLSw on an interface start at the Select Protocols window and select DLSw The Select Protocols window appears after you select a link or net module connector to which you are configuring DLSw The steps you take to enable DLSw services depend on whether you are enabling it e For the first time or a subsequent time e On Token Ring 802 5 or other SRB networks or on Ethernet 802 3 or Frame Relay 4 1 Configuring DLSw Services Configuring DLSw the First Time When you first configure DLSw you use Site Manager windows to Set the DLSw global parameters Add Source Routing global parameters Token Ring or other or if you choose to use SRB encapsulation on Ethernet or Frame Relay Enter Frame Relay mapping information Frame Relay without SRB encapsulation Set slot IP addresses Add peer IP addresses Add service access points SAPs Edit SDLC line parameters and SDLC local devices Setting the DLSw Global Parameters After you select DLSw from the Select Protocols window the DLSw Global Parameters window appears Figure 4 1 To set the DLSw global parameters follow these steps 1 Edit the IP Virtual Ring parameter
33. to drain the queues and transmit traffic Priority queues do not affect traffic as it is entering the router but rather affects the sequence in which data leaves an interface For this reason Protocol Prioritization is considered an outbound filter mechanism Two Types of Protocol Prioritization There are two separate implementations of protocol priority queuing For all synchronous protocols that support outbound traffic filters Bay Networks supports a high normal and low priority queue at the circuit interface level For inbound and outbound DLSw traffic Bay Networks also supports one to ten queues at the TCP level for DLSw peers Using existing protocol prioritization support you can prioritize DLSw traffic before other protocols DLSw protocol prioritization provides a mechanism for prioritizing specific types of DLSw traffic such as e Ethernet e Frame Relay e SDLC e Token Ring e Other source route bridge SRB traffic prioritization to DLSw traffic Note that TCP level prioritization alone does not give DLSw traffic precedence over other routing protocols For information about circuit level prioritization refer to Configuring Traffic Filters and Protocol Prioritization Note You can apply both circuit level prioritization and TCP level gt 6 2 Using DLSw Prioritization DLSw Priority Queues This section describes how DLSw protocol prioritization works and defines DLSw terms Although similar
34. to the existing circuit level protocol prioritization DLSw prioritization is not limited to synchronous interfaces and does not operate at the driver level DLSw prioritization occurs before TCP sequences packets where the Data Link Control LLC2 or SDLC and TCP function The router sorts packets into priority queues as described in The Enqueuing Process The router then drains dequeues the priority queues to transmit packets according to a weighted allocation algorithm described in The Dequeuing Process Based on the needs of your site you can configure up to 10 queues for each DLSw peer You can create queues for traffic with specific MAC or SAP address ranges or for SNA traffic based on criteria in the SNA Transmission Header FID2 and FID4 You determine whether a queue applies to all DLSw peers or to one or more specific configured peer Default and Peer Specific DLSw Queues To set the way the router handles priority queues for all DLSw traffic including unconfigured peers you use the default DLSw queue configuration To customize the handling of queued traffic for a particular configured peer you configure peer specific priority queues that apply to that peer s IP address only The default priority queue configuration applies to all configured DLSw peers except those individual peers for which you configure a custom priority queue When you create peer specific queues they take precedence over the default queu
35. 12 DLSw Protocol Prioritization Parameter Descriptions 6 13 Configuring Peer Specific Priority Queues o oo ee ee renee eee teat tent eters ee ee ee 6 15 Priority Queues for a Specific DLSW Peer iese ee ee AA ee AA Ge ee 6 15 Enabling or Disabling a Single Peers Priority Queues ie ss ee ee ee ee ee 6 19 Customizing Specific DLSw Peer Queues ee RA ee RA ee RA tnn nnnn nn 6 20 Peer Queue Configuration Parameter Descriptions 6 21 Creating DLSw Priority Filters iss dee ee ee ee ee Ge AA ee Re ee ee AA ee ee Ge ke ee ee ee 6 22 Using the DLSw Peer Configuration Window 0 0 0 eee ee ee ee ee ee 6 30 Sample Templates for DLSw Protocol Prioritization iese se ee ee Re AR ee 6 31 Appendix A DLSw Default Settings Appendix B Criteria for DLSw Prioritization Predefined DLSw Criteria ree be Se ee Se Ee Ee besteet B 2 DLSw Reference Points iese ee se RR Re ee ee RA ee ee Re ee ee Re ee ee Ge Re ee ee Re ee ee B 2 Specifying MAC Address Ranges ee se AE RA Re ee EE AA ee ee ee ed ee ee ee B 4 Source Routing Bridge Source MAC Addresses is ee se RA Ee ee AA B 4 Source Routing Bridge Functional MAC Addresses ee se AA ee B 5 Specifying Source and Destination SAP Code Ranges ie se RA ee AA B 5 Index Figure 1 1 Figure 1 2 Figure 1 3 Figure 1 4 Figure 1 5 Figure 1 6 Figure 1 7 Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 2 6 Figure 2 7
36. 12 Using DLSw Prioritization DLSw Protocol Prioritization Parameter Descriptions Use the following descriptions as guidelines when you configure parameters on the Global DLSw PP Parameters Defaults window Parameter Default Options Function Instructions Protocol Priority PP Disabled Enabled Disabled Toggles protocol prioritization for configured DLSw peers on and off If you set this parameter to Disabled all default priority queues will be disabled Setting this parameter to Disable is useful if you want to temporarily disable protocol prioritization for configured peers Set to Disable if you want to temporarily disable all protocol prioritization activity Set to Enable if you previously disabled protocol prioritization and now want to re enable it Note Once you enable a peer specific priority queue using the Peer Queues window you must use that window to disable that peer s queues You cannot disable queues that are already active from the Global DLSw PP Parameters Defaults window MIB Object ID Parameter Default Options Function Instructions MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 1 17 PP for Unconfigured Peers Disabled Enabled Disabled Toggles protocol prioritization for unconfigured DLSw peers on and off If you set this parameter to Disable all unconfigured priority queues will be disabled Setting this parameter to Disable is useful if you want to temporarily disable pro
37. 2 illustrate roadmaps to configuring and enabling DLSw ona Bay Networks router The roadmap you use depends on the specific type of interface on which you are configuring DLSw Figure 3 1 illustrates the steps for configuring DLSw on Token Ring or other source route bridge networks Figure 3 2 illustrates the steps for configuring DLSw on Ethernet 802 3 or Frame Relay 3 2 DLSw Configuration Overview Are you defining the first DLSw interface on the router Yes No subsequent DLSw interface Select a circuit Token Ring 802 5 or other except Ethernet 802 3 or Frame Relay Configure source routing global parameters Y Y Configure source routing interface parameters Y Configure DLSw global parameters H DH Define DLSw slots H Define DLSw peers D Define DLSw SAP addresses H D Site Manager automatically enables a DLSw interface on the selected circuit Site Manager automatically enables global TCP services gt if not already enabled End of mandatory configuration steps Configuration path for the first DLSw interface on the router Configuration path for the second and subsequent DLSw interface on the router If you already configured source routing on your router Site Manager does not prompt you to configure source routing global parameters during the DLSw conf
38. 23 5 52 Circuit Definition window 5 16 Circuit List window 5 15 circuitless IP used as a DLSw peer IP address 5 21 Clock Source parameter 4 14 CompuServe Bay Networks forum on xviii Configuration Manager window 5 3 configuration overview 3 1 configuration roadmaps 3 2 to 3 4 configured peers 5 1 congestion control DLSw protocol prioritization 6 7 criteria DLSw protocol prioritization 6 26 customer support See getting help D Data Link Switching DLSw See DLSw Default MAC Peer IP Address parameter 5 43 Default NetBIOS Peer IP Address parameter 5 37 Default Queue Bandwidths parameter 6 14 defaults DLSw parameters A 1 deleting DLSw default MAC peer IP entries 5 43 DLSw default NetBIOS peer IP entries 5 37 DLSW from a node 5 54 DLSw local device entries 5 54 Index 1 DLSw peer IP entries 5 20 DLSw SAP entries 5 31 DLSw slot entries 5 25 dequeuing algorithms weighted dequeuing 6 5 DLSw protocol prioritization 6 4 Destination Host MAC hex parameter 4 22 5 50 Destination Host SAP hex parameter 4 22 5 51 Disable parameter 4 19 5 47 DLCI parameter 4 6 DLS Local Device Configuration window 5 45 DLSw accessing parameters 5 2 and other protocols 1 14 bridging services source routing 2 11 translation bridge 2 13 translation bridge on an SRB circuit 2 11 transparent bridge 2 12 to 2 13 communication over TCP IP 1 6 to 1 7 configuration objects for dual switc
39. 3 6 1 4 1 18 3 5 1 6 9 1 4 Adding Slot IP Addresses The DLSw Slot Configuration window Figure 4 5 displays a list of the slot IP addresses you have added 4 7 Configuring DLSw Services Done Add Delete Apply Values Help Figure 4 5 DLSw Slot Configuration Window 1 Click on Add The second DLSw Slot Configuration window appears Figure 4 6 Figure 4 6 Add DLSw Slot Configuration Window 2 Enter the appropriate slot value and its IP address Use the following parameter descriptions as a guide 4 8 Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Enabling DLSw Services Click on OK The DLSw Slot Configuration window reappears Repeat the instructions in this section for each slot you want to add Click on Done Slot None 1 to 14 Specifies the slot number associated with the Token Ring or Ethernet interface over which DLSw is running Enter a slot number that is valid for running DLSw considering the router model and the slots that link modules can occupy You should enter only slots running DLSw 1 3 6 1 4 1 18 3 5 1 5 3 1 2 IP Address None Any IP address specified in dotted decimal notation Specifies a unique IP address for each slot running DLSw on the router The address cannot be reused on another slot The IP address specifies where the TCP connection
40. 4 Editing DLSw Parameters DIS Local Device Configuration DLSWNODE 0x04 551 Done Delete Apply jLink Details Values Help E E Disable ENABLE PU Name DLSWNODE PU Type T2 0 IDBLOCK 3 hex digits 000 IDNUM 5 hex digits 00000 Xid Format FIXED Figure 5 27 DLS Local Device Configuration Window 2 Click on the local device whose parameters you want to change Edit the parameters you want to change For information see the next section DLSw Local Devices Parameter Descriptions 3 Click on Apply to save your changes 4 Proceed as follows e To edit the parameters of another local device select that device and repeat Steps 2 and 3 e Select Link Details to display the SDLC Link Station Configuration window Refer to Configuring SDLC Services for information on the parameters in this window 5 45 Configuring DLSw Services e To add a local device start at the Configuration Manager window and select the connector to which you are adding a local device Select Edit Circuit then select the Protocols gt DLSw Local Devices menu path The DLS Local Device Configuration window Figure 5 28 appears with the Add button SCC eal vic Ceigeation ll Apply luese fel pss de Diesble PU Home P Type USR IEK 3 hez digita UHUH 5 hei digita Sid Foreant Figure 5 28 DLS Local Device Configuration Add Window e Ifyou are finished working with the local d
41. 5 20 Deleting a DLSw Peer IP Table Entry eise dese ee ee ee ee ee ee ee Ge AA ee ee ek ee ee ee 5 20 Editing the DLSw Slot IP Table iese ee ee ee AA Ge RA Ge AR RR Ge ee Re ee ee ee Re ee 5 21 Adding a DLSw Slot IP Table Entry iese sees see see ee ee ke de ee ee RA de ee ee RA ee ee ee ee ee 5 22 vii Editing a DLSw Slot IP Table Entry sesde ee dese ee ee ke ee ee ee ee ee ee ee ee ee ee ee ee 5 24 Deleting a DLSw Slot IP Table Entry eise dese ee ee ee ee ee ee ee Ge ee ee ee ee ee ee 5 25 Editing DLSw SAP Table Parameters iss ees esse dese ee ee ke de ee ee ee ee de ee ee Ge ee ee ee 5 26 Adding a DLSw SAP Table Entry iese esse dese ee ee ee ee de ee RA ee ee ee RA ee ee ee ee ee 5 27 Editing a DLSw SAP Table Entry 5 29 Deleting a D Gw SAP Table Entry 5 31 Editing DLSw Default NetBIOS Peer IP Table Parameters sees esse ke ee ee Re ee ee 5 32 Adding a DLSw Default NetBIOS Peer IP Table Entry 5 33 Editing a DL Gw Default NetBIOS Peer IP Table Entry 5 36 Deleting a DLSw Default NetBIOS Peer IP Table Entry ees sedes ee ee ke ee ee ee 5 37 Editing DLSw Default MAC Peer IP Table Parameters esse se sk ee ee ee ee 5 38 Adding a DLSw Default MAC Peer IP Table Entry 5 39 Editing a DLSw Default MAC Peer IP Table Entry iese esse ees se ee se ee ee ee ke ee ee ee 5 41 Deleting a DLSw Default MAC Peer IP Table Entry 5 43 Editing DLSw Local Devices Parameters idee
42. 53 Configuring DLSw Services Deleting a DLSw Local Device Entry To delete a DLSw Local Device entry from the router configuration start at the DLS Local Device Configuration window Figure 5 27 1 Select the DLSw local device to delete 2 Click on Delete Editing DLSw Traffic Filters and Protocol Prioritization For information on how to access and configure traffic filters and protocol prioritization for DLSw services refer to Chapter 6 Deleting DLSw from the Node You can delete DLSw from the node entirely To delete DLSw begin at the Configuration Manager window refer to Figure 5 1 and 1 Select Protocols gt DLSw Delete DLS A confirmation window appears 2 Click on OK The Configuration Manager window appears DLSw is no longer configured on the router 5 54 Chapter 6 Using DLSw Prioritization This chapter provides guidelines for implementing Data Link Switching DLSw TCP level Prioritization Following an overview of DLSw protocol prioritization later sections describe how to use Configuration Manager to e Configure priority queues that apply to all configured or unconfigured DLSw peers default queues e Configure priority queues that apply to individual configured DLSw peers peer specific queues e Create outbound traffic filters that process DLSw traffic into priority queues Note The steps in this chapter assume that DLSw is already configured on an interface and that the Peer Table
43. 9600 B 19200 B 32000 B 38400 B I 56 KB 64 KB 125 KB 230 KBI 420 KB 625 KB 833 KB 1 25 MB 12 5 MB 5 MB Sets the clock speed of an internally supplied clock when Clock Source is set to Internal Click on Values and set the clock speed for the internal clock to the desired data transmission rate across the synchronous line This parameter is unavailable when Clock Source is set to External 1 3 6 1 4 1 18 3 4 5 1 14 Sync Line Coding NRZ NRZ I NRZI NRZI Mark This parameter specifies the line coding of the physical synchronous line You can change the value of this parameter to match the line coding of a device at the other end of the line This parameter is relevant only for the AN and the ASN routers Other Bay Networks router platforms use NRZ encoding NRZ Indicates Non Return to Zero encoding NRZI Indicates Non Return to Zero Inverted encoding NRZI Mark Indicates Non Return to Zero Inverted Mark encoding Select the appropriate value for synchronous line coding 1 3 6 1 4 1 18 3 4 5 1 88 4 15 Configuring DLSw Services Parameter Cable Type Default Null Options Null RS232 RS422 V35 X21 Function Specifies the cable interface to the network Instructions Select the cable interface that you are using to connect to the network MIB Object ID 1 3 6 1 4 1 18 3 4 5 1 83 Parameter RTS Enable Default Disabled Options Enabled Disabled Function Controls the toggling
44. A_START 30 2 TPF Destination Subarea Address SNA_START 64 32 Field DSAF Origin Subarea Address Field SNA_START 96 32 OSAF Expedited Flow Indicator EFl SNA_START 135 1 Destination Element Field DEF SNA START 144 16 Origin Element Field OEF SNA_START 160 16 B 3 Configuring DLSw Services Specifying MAC Address Ranges When you create a filter that includes a Source or Destination MAC Address criterion you specify the MAC Address range in either most significant bit MSB or canonical format Table B 4 lists the address formats to use Table B 4 Format for Specifying Source Routing MAC Addresses Address Type Address Format PPP MSB PPP MSB Bay Networks Standard Frame Relay Canonical Bay Networks Proprietary PPP Canonical Token Ring MSB Ethernet Canonical When defining outbound traffic filters you can specify a MAC address in either MSB or canonical format but the default is canonical Source Routing Bridge Source MAC Addresses When specifying Source MAC Source Routing addresses set the most significant bit MSB to one For example Token Ring packets 1 The Source MAC address to be filtered is 0x40000037450440 2 Add the First Bit Set MAC Address 0x800000000000 3 Enter the filter criteria range as 0xC00037450440 Bit O the 0x80 bit of Byte 0 the leftmost byte indicates the presence of the Routing Information Field RIF This bit is set to 1 if th
45. B Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Editing DLSw Parameters Link Station Retries 4294967295 0 to 4294967295 Specifies the maximum number of times that a connect request is sent to the local SDLC device to establish a session Enter the number of retries you want Type a 0 if you do not want to send connect requests Leave the default value 4294967295 to send an infinite number of connect requests for this connection 1 3 6 1 4 1 18 3 5 1 5 12 1 14 SDLC Receive Credit 10 0 to 200 Specifies the maximum number of frames SDLC can send to DLSw This is a flow control parameter Enter the maximum number of frames you want SDLC to send to DLSw For example type a 1 if you want DLSw to accept 1 frame from SDLC before it updates the SDLC credit Type a 0 if you want DLSw to receive an infinite number of frames from SDLC without updating the SDLC credit 1 3 6 1 4 1 18 3 5 1 5 12 1 15 SDLC Transmit Credit 10 0 to 200 Specifies the maximum number of frames DLSw can send to SDLC Enter the maximum number of frames you want DLSw to send to SDLC For example type a 1 if you want DLSw to send only one frame to SDLC until it receives credit update from SDLC Type a 0 if you want DLSw to send an infinite number of frames to SDLC without updating the SDLC credit 1 3 6 1 4 1 18 3 5 1 5 12 1 16 5
46. Configuring DLSw Services Router Software Version 10 0 Site Manager Software Version 4 0 Part No 112914 Rev A January 1996 a Bay Networks m Bay Networks 4401 Great America Parkway 8 Federal Street Santa Clara CA 95054 Billerica MA 01821 Copyright 1988 1996 Bay Networks Inc All rights reserved Printed in the USA January 1996 The information in this document is subject to change without notice The statements configurations technical data and recommendations in this document are believed to be accurate and reliable but are presented without express or implied warranty Users must take full responsibility for their applications of any products specified in this document The information in this document is proprietary to Bay Networks Inc The software described in this document is furnished under a license agreement and may only be used in accordance with the terms of that license A summary of the Software License is included in this document Restricted Rights Legend Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 Gi of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 Notice for All Other Executive Agencies Notwithstanding any other license agreement that may pertain to or accompany the delivery of this computer software the rights of the United States Government regarding its use reproduction a
47. DLSw Configuration Overview Configuration Objects for Single Switch DLSw This section describes the objects you define when you configure DLSw services on the router specifically es DLSw SAPs es DLSw slots DLSw SAP Table For DLSw services to be applied to a packet you must define the packet s SAP to DLSw Each router maintains an independent list of DLSw SAP addresses in a global DLSw SAP Table Use the Configuration Manager to access and edit the DLSw SAP Table Each DLSw SAP Table entry has a unique hexadecimal value The default SAP Table includes SAPs 00 04 08 and OC hexadecimal This is sufficient for most SNA applications To support NetBIOS add SAP FO to the SAP Table Figure 3 3 shows a sample network with three routers running DLSw This network uses the following values in the SAP Tables e Router A the central site router supports both SNA and NetBIOS traffic SNA session traffic uses SAP 04 and NetBIOS traffic uses FO Additionally SNA requires SAP 00 for session initiation These hexadecimal values 00 04 FO must exist in the SAP Table e Router B the remote site supports NetBIOS traffic only SAP FO is the only required entry in the SAP Table e Router C a regional site supports SNA traffic only In this example SNA requires SAPs 00 and 04 in the SAP Table Note that SNA traffic can use other SAPs Most SNA traffic uses SAP 04 3 5 Configuring DLSw Services Router A 192 32 10 1
48. In both single and dual switch to switch networks you must map the addresses of the SDLC devices to Token Ring 802 5 addresses To map the addresses you configure the SDLC devices as local devices enabling them to appear to the network as natively attached LAN devices Chapter 5 describes how to configure local devices Refer to Configuring SDLC Services for information on configuring and tuning SDLC on a Bay Networks router Frame Relay Support Bay Networks routers support LLC2 routed over Frame Relay also known as native SNA over Frame Relay based on RFC 1490 RFC 1490 describes an encapsulation method for carrying internetwork traffic over a Frame Relay backbone This implementation of LLC2 also complies with the Frame Relay Forum Protocol Encapsulation over Frame Relay Implementation Agreements which 1 defines how routed SNA traffic traverses a Frame Relay network and 2 adds RFC 1490 support for Frame Relay to DLSw and APPN LLC2 over Frame Relay allows native SNA traffic originating from SDLC LAN or WAN attached devices to communicate over public or private Frame Relay networks directly with IBM 3745 or 3746 communications controllers Devices can communicate with intermediate routing nodes or in a single switch configuration function as a Frame Relay Access Device FRAD Figure 1 7 illustrates the connection of a host through a Frame Relay network in a configuration with multiprotocol traffic to other locations
49. K to save your entry to the configuration file The DLSw Slot Configuration window reappears refer to Figure 5 11 with the new entry added to the list of existing DLSw capable slots Following are descriptions of the DLSw Slot IP Table parameters Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Slot None 1 to 14 Specifies the slot number you want to associate with the IP interface address you reserved for that slot Type a slot number from 1 to 14 depending on e Type of node chassis e Slots that link modules can occupy 1 3 6 1 4 1 18 3 5 1 5 3 1 2 IP Address None Any valid 32 bit IP address in the form network host in dotted decimal notation Specifies an IP address associated with a specific DLSw peer slot in the router TCP uses this IP address for connections associated with that slot Type a valid IP address for the slot The IP interface need not reside on the DLSw capable slot Do not enter a value for every active slot in the router 1 3 6 1 4 1 18 3 5 1 5 3 1 3 5 23 Configuring DLSw Services Editing a DLSw Slot IP Table Entry You can edit only the IP Address for TCP Connection parameter in an existing DLSw Slot IP Table entry To edit the IP address associated with a particular slot begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw7Slot IP Ta
50. Manager window e If you selected a connector to invoke the Edit Connector window refer to Figure 5 5 the Configuration Manager window appears indicating that you completed the procedure Editing DLSw Peer IP Table Parameters The DLSw Peer IP Table contains the list of all configured remote peers known to the local router This section describes how to add edit and delete configured peers Refer to Chapter 3 for more information on configured and unconfigured peers To access the DLSw Peer IP Table begin at the Configuration Manager window refer to Figure 5 1 and select Protocols gt DLSw Peer IP Table The DLSw Peer Configuration window appears listing all DLSw configured peers known to the local router Figure 5 8 5 17 Configuring DLSw Services 12 67 56 4 Default Uee Bandai de be Protocol Priority Hex Queue tier Hee Queue Gire Figure 5 8 Configured Peer in DLSw Peer Configuration Window Note The DLSw protocol prioritization and traffic filtering functions are described in Chapter 6 Refer to this chapter for information on the Protocol Priority Max Queue Buffers and Max Queue Size parameters as well as information on the protocol priority buttons in the DLSw Peer Configuration window Adding a DLSw Peer IP Table Entry To add a new DLSw Peer IP Table entry begin at the DLSw Peer Configuration window refer to Figure 5 8 and then 1 Click on Add The second DLSw Peer Configuration wi
51. P IP ca Network DLSw Peer IP Virtual Ring DLSw Peer Ze DL Gw Peers Using an IP Virtual Ring NetBIOS and SNA systems on a LAN attached to a DLSw peer perceive the IP virtual ring only as a physical boundary the last ring on that LAN or source routing segment You must count the IP virtual ring when you determine the number of ring and bridge elements in each source routing segment connected to a DLSw peer Ze 2 4 DLSw Implementation Notes Just as each physical Token Ring in a source routing network has an associated Ring ID the IP virtual ring also has a Virtual Ring ID You enter the IP virtual ring ID with the IP Virtual Ring parameter The virtual ring also has an associated Maximum Transmission Unit MTU size The Virtual Ring MTU parameter specifies a maximum size for frames sent from local systems to systems on remote source routing networks Use as a value for the MTU the smallest frame size supported on any remote source routing segment in your network You can access and edit the IP Virtual Ring and Virtual Ring MTU parameters through the DLSw Global Parameters window Note Site Manager requires you to enter values for the IP Virtual Ring and Virtual Ring MTU parameters even if your network only includes Ethernet S02 3 circuits configured for access to DLSw services Count the IP virtual ring as one ring in each source routing segment attached to your TCP IP network You count
52. P IP network Once you initialize DLSw services the local router establishes two TCP connections one for transmitting one for receiving between each local DLSw capable slot and every configured peer in the TCP IP network Remote DLSw peers on the network follow the same procedure DLSw uses TCP ports 2065 and 2067 Simplifying the Peer IP Table Bay Networks provides two mechanisms for reducing the number of required entries in the DLSw Peer IP Table These are e Broadcast peers e Unconfigured peers Broadcast Peers Any DLSw slot that receives a broadcast will forward that frame to all other DLSw slots in this same router Therefore it is not necessary to enter more than one peer per remote router into the Peer IP Table The entry representing the remote router is the broadcast peer for that router Unconfigured Peers A Bay Networks router running DLSw can respond to requests from remote routers to initiate DLSw sessions even if the remote peer is not defined in the local router s Peer IP Table Once a DLSw session is established to a remote slot that slot is dynamically added to the list of known peers Any remote DLSw peer that the router learns dynamically is an unconfigured peer These peers are not listed in a router s Peer IP Table Unconfigured peers are supported only if the DLSw Reject Unconfigured Peers parameter is set to Accept 3 10 DLSw Configuration Overview Unconfigured peers normally do not
53. P entry for NetBIOS is OxFO MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 4 1 2 Editing SDLC Line Parameters and SDLC Local Devices To configure DLSw on synchronous interfaces COM COM2 etc using the SDLC protocol 1 Select SDLC from the WAN protocols window The Configuration Manager displays the SDLC Line Parameters window Figure 4 11 4 13 Configuring DLSw Services SILC Line Parameters Cancel OK Values Help Clock Source INTERNAL Internal Clock Speed 19200 Sync Line Coding NRZ Cable Type RS232 RTS Enable JEISABLE Figure 4 11 SDLC Line Parameters Window 2 Edit the Clock Source Internal Clock Speed Sync Line Coding Cable Type and RTS Enable parameters as follows Parameter Clock Source Default Internal Options External Internal Function Specifies the origin of the synchronous timing signals If you set this parameter to Internal this router supplies the required timing signals If you set this parameter to External an external network device supplies the required timing signals Instructions Set this parameter to either Internal or External as appropriate for your network MIB Object ID 1 3 6 1 4 1 18 3 4 5 1 13 4 14 Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Enabling DLSw Services Internal Clock Speed 64 KB 1200 BI 2400 B 4800 B 7200 B
54. Queue Size parameter 6 22 PP for Unconfigured Peers parameter 6 13 Protocol Priority parameter 6 13 6 21 queue depth 6 7 tuning 6 7 usefulness of 6 1 Protocol Priority parameter 6 13 6 21 PU Name parameter 4 19 5 47 PU Type parameter 4 19 5 48 Q queue depth DLSw protocol prioritization 6 7 queues priority about 6 2 DLSw 6 3 configuring 6 22 configuring default 6 12 Index 5 configuring peer specific 6 15 enabling and disabling 6 19 DLSw enqueuing 6 4 R Reject Unconfigured Peers parameter 5 10 Remote MAC parameter 4 7 RFC 1490 Frame Relay standard 1 11 RTS Enable parameter 4 16 S SAP address in a TEST frame 2 12 in an explorer frame 2 11 SAP parameter 4 13 5 28 SAP Window parameter 5 31 SAP window purpose of 2 17 SAPs defined 3 5 SDLC enabling DLSw over 4 13 to 4 16 Supported interfaces 1 8 topologies 1 8 SDLC conversion 1 8 to 1 11 SDLC Line Parameters window 4 14 SDLC Receive Credit parameter 4 25 5 53 SDLC Transmit Credit parameter 4 25 5 53 secondary link stations 1 8 Select Protocols window 4 16 single switch SDLC conversion 1 9 to 1 11 single switch services 1 3 to 1 4 Slot parameter 4 9 5 23 SNA sample template 6 31 SNA sample template 6 24 Source Virtual MAC hex parameter 4 21 5 50 Source Virtual SAP hex parameter 4 22 5 50 Source Route Bridge topology considerations 2 1 to 2 9 computing DLSw connection path 2 8 to
55. Software 5 1 Configuring DLSw Services Caution The Technician Interface does not verify that the value you enter for a parameter is valid Entering an invalid value can corrupt your configuration You may want to customize the LLC2 TCP IP APPN SDLC or source routing bridge parameters as well since these support DLSw services on the router If so refer to one of the guides listed in Table 5 1 Otherwise you can access parameters of the DLSw support protocols from the Protocols menu of the Configuration Manager window or the Circuit Definition window Table 5 1 Customizing the DLSw Support Protocols Protocol Refer To TCP Configuring TCP Services IP and IP RIP Configuring IP Services Source routing Configuring Bridging Services bridge LLC2 Configuring LLC Services SDLC Configuring SDLC Services APPN Configuring APPN Services DLSw local circuit definition Accessing DLSw Parameters To access and edit DLSw parameters begin at the Configuration Manager window and select Protocols gt DLSw Figure 5 1 5 2 Editing DLSw Parameters Local LOCAL FILE 2 eet ue die Lirik HI Version si OI Deacription 5700 Quad Syme Empey Slot Empty Slot Empty Slot System Fesource Rodale Figure 5 1 Configuration Manager Window Editing DLSw Global Parameters To edit DLSw global parameters begin at the Configuration Manager window Figure 5 1 and then 1 Select
56. Sw SAP Table Entry To add a new SAP Table entry begin at the DLSw SAP Configuration window Figure 5 15 and 1 Click on Add The DLSw SAP Configuration window appears as shown in Figure 5 16 Figure 5 16 SAP Parameter in DLSw SAP Configuration Window 5 27 Configuring DLSw Services Type the 0x prefix and then enter a hexadecimal value for the SAP parameter Valid SAP addresses include even values 00 04 to EC and FO Click on OK This saves your entry to the router configuration file The DLSw SAP Configuration window reappears refer to Figure 5 15 with the new entry added to the list of existing DLSw SAPs Repeat Steps 1 through 3 for each SAP you want to add Click on Done The Configuration Manager window reappears Following is a description of the SAP parameter Parameter Default Options Function Instructions MIB Object ID SAP None An even numbered SAP address 00 04 to EC FO in hexadecimal format Specifies the destination service access point SAP address associated with a communication subsystem on a remote device for example on a PC or host Begin the address with Ox and type the SAP address associated with a specific communication subsystem For example the SAP associated with NetBIOS is OXFO 1 3 6 1 4 1 18 3 5 1 5 4 1 2 5 28 Editing DLSw Parameters Editing a DLSw SAP Table Entry You can edit only the SAP Window flow control parameter associated with
57. Sw SAPs Figure 2 10 DLSw and Transparent Bridging on Ethernet 802 3 Circuits DLSw with Translation Bridge The router supports DLSw and translation bridge services on an Ethernet 802 3 circuit Figure 2 11 You configure translation bridge services independent of DLSw services on the router as appropriate for the topology of your network To an end user system on an SRB circuit the translation bridge looks like a source routing bridge To an end user system on an Ethernet 802 3 circuit the translating bridge looks like a transparent bridge 2 13 Configuring DLSw Services Bay Networks Router Translating Bridge Service e Source Routing SG Transparent i Bridge i i Bridge ER TEST NE T l ie Token Ring Segment Ethernet 802 3 Segment Figure 2 11 Translation Bridge Services The translation bridge service e Supports communication between systems on SRB and Ethernet 802 3 segments locally attached to the same router e Maps between SRB and Ethernet 802 3 framing requirements Memory Requirements DLSw provides buffering of LLC2 packets in single switch mode and additional buffering of TCP packets in dual switch mode Therefore DLSw can use a significant amount of memory To limit the memory consumption Bay Networks provides several mechanisms including e LLC2 Max Links parameter allowing the network administrator to limit the number of LLC2 stations per interface Refer to Configuring LLC Serv
58. T2 1 T4 T5 node exchanges N A Source Virtual MAC hex None Any standard MSB Token Ring MAC address Specifies the source MAC address of an emulated Token Ring endstation for this device Enter the 12 digit hexadecimal source MAC address you want to assign to the SDLC device The address should be in MSB format and it should be unique in the network even among other source addresses on the router 1 3 6 1 4 1 18 3 5 1 5 12 1 6 4 21 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Source Virtual SAP hex 0x4 0x01 to OxFE Specifies the source service access point SAP of an emulated Token Ring or Ethernet endstation for this device Begin the address with Ox and enter a 1 digit or 2 digit hexadecimal source SAP address associated with this device Typical values are multiples of 4 1 3 6 1 4 1 18 3 5 1 5 12 1 7 Destination Host MAC hex None Any standard MSB Token Ring MAC address Identifies with the Destination SAP the Token Ring or Ethernet host the local device will reach via SDLC services Consult your host system manager for the host MAC address then enter the 12 digit hexadecimal address 1 3 6 1 4 1 18 3 5 1 5 12 1 8 Destination Host SAP hex 0x4 0x01 to OxFE Identifies wi
59. The router sends the requested number of packets or bytes to TCP from the top of the dequeue list up to the configured queue limit 5 TCP transmits the packets 6 The sequence repeats at Step 1 Figure 6 1 illustrates weighted dequeuing 6 5 Configuring DLSw Services TCP requests packets from a DLSw Peer Wait for DLSw packets there packets in any of the DLSw Peer s queues there packets in the dequeue list Forward packets Divide the size with the lowest of each packet weighted score Ge SE to TCP configured o bandwidth Subtract the packet s time in Was the the queue to TCP request produce a satisfied weighted score Move the first oldest packet from each queue for this peer to the dequeue list Figure 6 1 Weighted Bandwidth Allocation 6 6 Using DLSw Prioritization Tuning DLSw Protocol Prioritization This section explains how congestion control and queue depth affect DLSw prioritization results for your network The sections Customizing the Default Queue Configuration and Customizing Specific DLSw Peer Queues later in this chapter show how to use Configuration Manager to configure these values DLSw Priority Queues and Congestion Control Because the router cannot clip DLSw traffic without breaking the DLSw session DLSw protocol prioritization includes an internal congestion control feature to e Temporarily save overflow packet
60. a distributor or authorized reseller contact the technical support staff of that distributor or reseller for assistance with installation configuration troubleshooting or integration issues Customers also have the option of purchasing direct support from Bay Networks through a variety of service programs The programs include priority access telephone support on site engineering assistance software subscription hardware replacement and other programs designed to protect your investment To purchase any of these support programs including PhonePlus for 24 hour telephone technical support call 1 800 2LANWAN Outside the U S and Canada call 408 764 1000 You can also receive information on support programs from your local Bay Networks field sales office or purchase Bay Networks support directly from your reseller Bay Networks provides several methods of receiving support and information on a nonpriority basis through the following automated systems CompuServe Bay Networks maintains an active forum on CompuServe All you need to join us online is a computer a modem and a CompuServe account We also recommend using the CompuServe Information Manager software available from CompuServe xviii About This Guide The Bay Networks forum contains libraries of technical and product documents designed to help you manage and troubleshoot your Bay Networks products Software agents and patches are available and the message boar
61. a DLSw Slot Table Entry 5 25 Configuring DLSw Services The system software deletes the entry you selected and the entry disappears from the list of DLSw Slot IP Table entries in the DLSw Slot Configuration window 3 Click on Done You return to the Configuration Manager window Editing DLSw SAP Table Parameters The DLSw SAP Table contains a list of the service access point SAP addresses associated with communication subsystems on PCs hosts FEPs cluster controllers and other systems in your network This section describes how to add edit and delete DLSw SAPs Each SAP Table entry establishes a DLSw SAP address and a SAP window flow control parameter value for that SAP See Chapter 3 for more information on DLSw SAPs DLSw SAP Table entries appear in the DLSw SAP Configuration window When you add DLSw to a router configuration there are four predefined SAP entries 00 04 08 and OC Figure 5 15 To access the DLSw SAP Configuration window begin at the Configuration Manager window refer to Figure 5 1 and select Protocols gt DLSwSAP Table The DLSw SAP Configuration window appears Figure 5 15 listing all SAP addresses that are accessible by means of DLSw services on the router 5 26 Editing DLSw Parameters DLSw SAP Configuration nae 0x004 Add 0x008 0x00C Delete Apply Values Help SAP Window Figure 5 15 SAP Addresses in DLSw SAP Configuration Window Adding a DL
62. able A 6 DLSw SAP Parameters Parameter Default SAP Window 10 frames SAP None Table A 7 DLSw Default NetBIOS Peer IP Table Parameters Parameter Default Default NetBIOS Peer IP Address None NetBIOS Name None NetBIOS Peer IP Address None Table A 8 DLSw Default MAC Peer IP Table Parameters Parameter Default Default MAC Peer IP Address None MAC Address None MAC Peer IP Address None A 3 Configuring DLSw Services Table A 9 DLSw Local Devices Parameters Parameter Default Disable Enable PU Name None PU Type None IDBLOCK None IDNUM None XID Format None Source Virtual MAC hex None Source Virtual SAP hex None Destination Host MAC hex None Destination Host SAP hex 0x4 MAXOUT 7 MAXDATA 2057 Canureach Timer 30 s Canureach Retries 4294967295 Link Station Timer 30 s Link Station Retries 4294967295 SDLC Receive Credit 10 SDLC Transmit Credit 10 Appendix B Criteria for DLSw Prioritization This appendix includes both the DLSw predefined criteria that the Configuration Manager provides and the supported DLSw reference points for user defined criteria for DLSw prioritization described in Chapter 6 B 1 Configuring DLSw Services Predefined DLSw Criteria You configure outbound filters for DLSw traffic based on the predefined criteria listed in Table B 1
63. affic e Source and destination MAC address this can be used to provide host bound traffic preference over other traffic e Any field in the SNA Transmission Header TH and Response Request Header RH this can be used to provide Class Of Service COS priority preference Configuring DLSw Services You can also prioritize traffic based on any values within the headers and data packets For detailed information about DLSw prioritization refer to Chapter 6 Using DLSw Prioritization Protocol Prioritization You can use protocol prioritization to transmit DLSw traffic before other traffic on an individual synchronous line interface This is done by creating a filter as follows e Criteria TCP source port e Range 2065 2067 e Action high queue This ensures that SNA and NetBIOS traffic receive preference on the network For more information on how to access and configure traffic filters for DLSw services refer to Chapter 6 Using DLSw Prioritization DLSw and Related Protocols DLSw uses the services of lower layer subsystems depending on the type of interface being configured and the services required Related subsystems include e Physical interface Token Ring Ethernet WAN FDDI etc e Transport services Source Route Bridging Transparent Bridging Frame Relay etc e Data Link Control services LLC2 SDLC e TCP IP services dual switch only Data Link Switching Overview For More Inform
64. an existing DLSw SAP Table entry Note After you add an entry to the DLSw SAP Table Site Manager disallows any attempt to edit the SAP address associated with that entry To change the address of an existing DLSw SAP you delete the entry in the DLSw SAP Configuration window then add a new SAP with the new address Refer to the preceding section Adding a DLSw SAP Table Entry for information about how to add a new DLSw SAP To edit the SAP Window parameter associated with a particular DLSw SAP begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSwSAP Table The DLSw SAP Configuration window appears Figure 5 17 2 Select the DLSw SAP Table entry to edit 3 Click on the SAP Window parameter box and enter a new value 4 Click on Apply This saves your changes Figure 5 17 5 29 Configuring DLSw Services Done Add Delete Apply Values Help DE SE SAP Window Figure 5 17 Saving the Edited SAP Window Setting 5 Click on Done You return to the Configuration Manager window Following is a description of the SAP Window parameter 5 30 Parameter Default Range Function Instructions MIB Object ID Editing DLSw Parameters SAP Window 10 frames 6 to 200 frames Specifies the maximum number of unacknowledged LLC2 frames that the local endstation DLSw switch accepts for forwarding to the remote endstation See the section Flow Con
65. ar templates 6 31 Appendix A DLSw Default Settings Tables A 1 through A 8 list the default settings for DLSw parameters Use the Configuration Manager to edit the default settings Table A 1 DLSw Global Parameters Parameter Default Enable Enable TCP Window Size 8000 octets IP Virtual Ring None Max Slot Sessions 200 sessions per slot Virtual Ring MTU 1500 MAC Cache Age 300 s NetBIOS Cache Age 300s Reject Unconfigured Peers Accept Keepalive Time sec 60 Maximum Package Size 1532 bytes Packaging Timeout 10 ms Packaging Threshold 20 percent of TCP window size A 1 Configuring DLSw Services Table A 2 DLSw Interface Parameters Parameter Default Enable Enable Mode Primary Table A 3 DLSw Peer IP Table Parameters Parameter Default Peer IP Address None Table A 4 DLSw Protocol Prioritization Parameters Parameter Default Protocol Priority Disabled PP for Unconfigured Peers Disabled Max Queue Buffers for Unconfig 50 Peers Max Queue Size for Unconfig 16000 Peers Default Bandwidths 60 40 0 0 0 0 0 0 0 0 Max Queue Buffers 50 Max Queue Size 16000 Queue Number None Queue Bandwidth Percent 0 A 2 Table A 5 DLSw Slot IP Table Parameters DLSw Default Settings Parameter Default IP Address for TCP Connection None Slot None IP Address None T
66. ation about DLSw The following publications provide more detailed technical information related to DLSw services Dixon Roy C and Kushi David M Data Link Switching Switch to Switch Protocol RFC 1434 March 1993 IBM Corporation NetBIOS Frames Protocol IBM Local Area Technical Reference SC30 3383 03 December 1990 International Standards Organization SO 8802 2 IEEE Std 802 2 International Standard Information Processing Systems Local Area Networks Part 2 Logical Link Control December 31 1989 International Standards Organization ISO IEC DIS 10038 DAM 2 MAC Bridging Source Routing Supplement December 1991 Wellfleet Communications Integrating SNA amp Multiprotocol LAN Networks A Complete Guide March 1993 Chapter 2 DLSw Implementation Notes This chapter provides information on DLSw configurations support protocols and performance when configuring and customizing DLSw services on your network It includes e Source route bridge topologies e Parallel data paths e Multiple DLSw peers on a LAN e DLSw and bridging services e Memory requirements e TCP considerations e Flow control e Performance Source Route Bridge Topologies This section describes how to count LAN and bridge elements along any DLSw connection path that passes through source route bridge SRB LANs such as Token Ring 802 5 on either side of the TCP IP network The physical elements in this path are the SRB LANs and the brid
67. ay Networks DLSw node where the data is translated into SSP datagrams The data is then routed over the multiprotocol backbone to a remote Bay Networks DLSw node using an IP routing protocol When the SSP datagram reaches the remote Bay Networks DLSw node it is translated into the appropriate frame and carried to its destination Figure 1 4 shows how SNA devices use DLSw dual switch services to communicate over TCP IP This differs from adjacent single switch operation which uses LLC2 on the backbone Cluster Controller NetBIOS Server SNA Token Ring Processor LLC2 EL I Ethernet LLC2 Bay Networks Router Bay Networks Router le LLC 2 gt lt 4 IP gt lt LLC 2 or SDLC eases EA EE gt Logical Connection Figure 1 4 DLSw Dual Switch Services for SNA Devices on LANs Configuring DLSw Services SDLC Support The Bay Networks integrated SDLC support merges the low speed SDLC traffic of an SNA network with the high speed multiprotocol traffic of LANs into a single network backbone SDLC operates in DLSw single switch routers or in dual switch to switch networks as illustrated in Figure 1 1 DLSw integrated SDLC supports devices configured as primary or secondary link stations to the router Only one link station on an SDLC line can be the primary station all other stations on the line must be secondary A link station is a logical conn
68. ble The DLSw Slot Configuration window appears Figure 5 13 2 Select the DLSw Slot IP Table entry 3 Click on the IP Address for TCP Connection parameter box and enter a new IP address 4 Click on Apply This saves your changes to the router configuration file Delete Apply Values Help E KE IP Address for TCP Connection 198 42 62 4 E Figure 5 13 Saving an Edited DLSw Slot IP Address 5 Click on Done The Configuration Manager window reappears Following is a description of the IP Address for TCP Connection parameter 5 24 Editing DLSw Parameters Parameter IP Address for TCP Connection Default None Options Any valid 32 bit IP address in the form network host in dotted decimal notation Function Specifies an IP address associated with a specific DLSw peer slot in the router TCP uses this IP address for connections associated with that slot Instructions Type a valid IP address for each slot The IP interface need not reside on the DLSw capable slot Do not enter a value for every active slot in the router MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 3 13 Deleting a DLSw Slot IP Table Entry To delete a DLSw Slot IP Table entry start at the DLSw Slot Configuration window Figure 5 14 1 Select the Slot IP Table entry 2 Click on Delete Done Add Delete Apply Values Help KR a d IP Address for TCP Connection 198 42 62 4 le Figure 5 14 Deleting
69. ble entry The router adds this IP address to the list of configured peers in the local DLSw Peer IP Table 1 3 6 1 4 1 18 3 5 1 5 11 1 3 5 35 Configuring DLSw Services Editing a DLSw Default NetBIOS Peer IP Table Entry You can edit only the Default NetBIOS Peer IP Address parameter in a Default NetBIOS Peer IP Table entry To edit the parameter begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw Default NetBIOS The DLSw NetBIOS Peer Configuration window appears Figure 5 21 2 Select the DLSw Default NetBIOS Peer IP Table entry to edit 3 Click on the Default NetBIOS Peer IP Address parameter and enter a new address 4 Click on Apply This saves your change to the router configuration file Done Add Delete Apply Values Help KM SE Default NetBios Peer IP Address 198 42 61 5 le Figure 5 21 Saving a DLSw Default NetBIOS Peer IP Table Entry 5 Click on Done You return to the Configuration Manager window 5 36 Editing DLSw Parameters Following is a description of the Default NetBIOS Peer IP Address parameter Parameter Default NetBIOS Peer IP Address Default None Options Any valid 32 bit IP address in the form network host using dotted decimal notation Function Specifies the IP address of the remote DLSw peer that can reach the NetBIOS client server system or application currently selected in the DLSw NetBIOS Peer Configuration
70. delivers information as reliably as existing SNA networks Integrated SDLC to LLC2 conversion enabling the customer to reduce the cost of Front End Processor for example 3745 ports maintenance and software RFC 1490 LLC2 over Frame Relay support enabling a Bay Networks router to communicate across a Frame Relay network directly to a Front End Processor or other device that supports this protocol DLSw Prioritization allowing preferred traffic to receive higher priority Up to ten priority levels can be defined with weights assigned to each priority queue Prioritization uses standard DLSw TCP ports without affecting multivendor interoperability The Bay Networks DLSw implementation is fully interoperable with the IBM 6611 Network Processor and other RFC 1434 DLSw implementations 1 2 Data Link Switching Overview DLSw runs on all Bay Networks router platforms using local and wide area network facilities including e LAN media including Ethernet Token Ring and Frame Relay e Other LAN media using SRB formats over Ethernet FDDI SMDS Frame Relay and Point to Point PPP protocols e SDLC links in point to point and multipoint configurations You can use DLSw services to support connections between SNA and NetBIOS systems on one type of network such as Token Ring 802 5 and systems on different types of networks such as Frame Relay LANs and transparent bridge Ethernet S02 3 LANs Source route bridge LANs includ
71. detailed information on this window When you are finished click on OK 4 25 Configuring DLSw Services The main Configuration Manager window appears You have now completed the installation of DLSw If you have not already configured the IP addresses of the slots and connection to the IP network add them now 4 26 Chapter 5 Editing DLSw Parameters This chapter describes how to edit DLSw global and interface parameters as well as how to add edit and delete the following configuration objects e Configured peers e Slots e Service access points SAPs e Default NetBIOS peers e Default MAC peers e Local devices This chapter also describes how to delete DLSw services from all circuits simultaneously The Site Manager sequence for adding the first DLSw interface to your router configuration first requires you to define an initial set of DLSw configured peers slots and SAPs Using the Parameter Descriptions Each DLSw parameter description provides information about default settings valid parameter options the parameter function instructions for setting the parameter and the Management Information Base MIB object ID The Technician Interface allows you to modify parameters by issuing set and commit commands with the MIB object ID This process is equivalent to modifying parameters using Site Manager For more information about using the Technician Interface to access the MIB see Using Technician Interface
72. dow iese ee ee ee 5 33 DLSw NetBIOS Configuration Window ee ee ee AA ee ee 5 34 Saving a DLSw Default NetBIOS Peer IP Table Entry sassen 5 36 Deleting a DLSw Default NetBIOS Peer IP Table Entry a 5 38 DLSw MAC Peer Configuration WindOW iese ee se Re AA ee ee 5 39 MAC Addresses in the DLSw MAC Configuration Window ees 5 40 Figure 5 25 Figure 5 26 Figure 5 27 Figure 5 28 Figure 6 1 Figure 6 2 Figure 6 3 Figure 6 4 Figure 6 5 Figure 6 6 Figure 6 7 Figure 6 8 Figure 6 9 Figure 6 10 Figure 6 11 Figure 6 12 Figure 6 13 Figure 6 14 Figure 6 15 Figure 6 16 Figure 6 17 Figure 6 18 Figure 6 19 Figure 6 20 Figure 6 21 Figure 6 22 Figure 6 23 Saving a DLSw Default MAC Peer IP Table Ent 5 42 Deleting a DLSw Default MAC Peer IP Table Entry 5 43 DLS Local Device Configuration Wimdow 5 45 DLS Local Device Configuration Add Window 5 46 Weighted Bandwidth Allocation ee se ee ee Re ee ee Re ee ee Re ee ee 6 6 Selecting DLSw Protocol Prioritization iese ee ee ee AA ee ee 6 9 Global DLSw PP Parameters Defaults Window 6 10 Enabling Protocol Prioritization on DLSw Peers eseese 6 10 Enabling PP for Unconfigured Peers eed ee de ee ee ee de ee de dd ee ee 6 11 Enabling Protocol Prioritization for All DLSw Peers 6 11 Global DLSw PP Parameters Defaults Window 6 12 Selecting the Peer Queue Entries Window iese ee Re AR ek 6 15 Peer Q
73. ds are monitored by technical staff and can be a source for problem solving and shared experiences Customers and resellers holding Bay Networks service contracts can visit the special libraries to acquire advanced levels of support documentation and software To open an account and receive a local dial up number call CompuServe at 1 800 524 3388 and ask for Representative No 591 e Inthe United Kingdom call Freephone 0800 289378 e In Germany call 0130 37 32 e In Europe except for the United Kingdom and Germany call 44 272 760681 e Outside the U S Canada and Europe call 614 529 1349 and ask for Representative No 591 or consult your listings for an office near you Once you are online you can reach our forum by typing the command GO BAYNETWORKS at any prompt InfoFACTS InfoFACTS is the Bay Networks free 24 hour fax on demand service This automated system contains libraries of technical and product documents designed to help you manage and troubleshoot your Bay Networks products The system can return a fax copy to the caller or to a third party within minutes of being accessed World Wide Web The World Wide Web WWW is a global information system for file distribution and online document viewing via the Internet You need a direct connection to the Internet and a Web Browser such as Mosaic or Netscape xix Configuring DLSw Services Bay Networks maintains a WWW Home Page that you can access at ht
74. e The Enqueuing Process The router enqueues packets that match a DLSw priority filter as follows 1 Applies filter rules 2 Stamps packets with a queue number 3 Places packets in appropriate queues 6 3 Configuring DLSw Services The router holds packets in the assigned priority queue according to how you configure DLSw protocol prioritization Based on the needs of your site you can configure up to 10 queues Queue 0 to Queue 9 for each DLSw peer For example you could assign a separate queue for each filter criterion for specific address ranges or for particular DLSw peers When you enable DLSw protocol prioritization you distribute the available bandwidth for a configured DLSw peer among its priority queues The combined bandwidth of each peer s queues totals 100 percent By default there are two DLSw priority queues Queue 0 receives 60 percent of the bandwidth and Queue 1 receives 40 percent Nonordered Queues Although Site Manager numbers the DLSw priority queues the queue number hierarchy does not determine priority You configure both the number of queues for each DLSw peer and the percentage of bandwidth assigned to each queue For example you could assign 50 percent of available bandwidth to Queue 3 and 25 percent each to Queues 1 and 0 The Dequeuing Process The algorithm for DLSw bandwidth allocation is called weighted dequeuing With weighted dequeuing packets at the front of the protocol prio
75. e Specifies the block number which must match the host s IDBLOCK parameter value that identifies incoming connection requests This parameter is used with the PU Type IDNUM and XID Format parameters to determine the station exchange identification XID value Obtain the configured value at the host from VTAM or other host operating system for this device In most cases Enter 017 for a 3174 in T2 0 mode Enter 061 for a T2 0 node in fixed format N A IDNUM None Any 5 digit hexadecimal value from 00000 to FFFFF for T2 0 nodes Specifies the ID number which must match the host s IDNUM parameter value that identifies incoming connection requests This parameter is used with the PU Type IDBLOCK and XID Format parameters to determine the station exchange identification XID value Obtain the configured value at the host from VTAM or other host operating system for this device Enter a 5 digit hexadecimal value from 00000 to FFFFF for T2 0 nodes N A 4 20 Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Enabling DLSw Services XID Format None FIXED VARIABLE VARIABLE2 Specifies the format of the XID I field Enter one of the following options FIXED Fixed format for T2 0 VARIABLEI Variable format for T1 T2 0 T2 1 to T4 T5 node exchanges VARIABLE2 Variable format for T2 1 to
76. e FIXED VARIABLE VARIABLE2 Specifies the format of the XID I field Click on Values and select one of the following options FIXED Fixed format for T2 0 VARIABLEI Variable format for T1 T2 0 T2 1 to T4 T5 node exchanges VARIABLE2 Variable format for T2 1 to T2 1 T4 T5 node exchanges N A 5 49 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Source Virtual MAC hex None Any standard MSB Token Ring MAC address Specifies the source MAC address of an emulated Token Ring endstation for this device Type the 12 digit hexadecimal source MAC address you want to assign to the SDLC device The address should be in MSB format and it should be unique in the network even among other source addresses on the router 1 3 6 1 4 1 18 3 5 1 5 12 1 6 Source Virtual SAP hex 0x4 0x01 to OxFE Specifies the source service access point SAP of an emulated Token Ring or Ethernet endstation for this device Begin the address with Ox and type a 1 digit or 2 digit hexadecimal source SAP address associated with this device Typical values are multiples of 4 1 3 6 1 4 1 18 3 5 1 5 12 1 7 Destination Host MAC hex None Any standard MSB Token Ring MAC address Identifies with the Destination SAP
77. e Webs E xix How to Get el RR AR OR OE EE EER EE RE ii XX eer ele EE OE EE ON SERE ER RE ER N XX Ordering Bay Networks Publications esse ek AAR AA Re ee ee AA Re ee ee AA ee xxi AGONY MS sce Ses gece EER EE E SE REENERT S xxi Chapter 1 Data Link Switching Overview DLSw Networking Overview iis ee AA ee AR AA Ge AA AR AA Ge AA AR ee ee AA ee ee ee RA ee ee ee 1 2 DLSw Single and Dual Switch to Switch Services iese ed ek AA ee Ge AA ee ee 1 3 DLSw Single Switch Services ie ee ee Ge AA ee Re AA Ge Re ee ee ee ee 1 5 DLSw Dual Switch Services ii ee ee ek AA ee Ge AA ee RA AA Ge AR Re ee ee AA ee ee 1 6 SDLE SUPPORT EA ES OD AE ER ED tat EE OR E oA rt 1 8 Integrated SDLC Conversion iese ee ee ee Ge AA ee AA Ge Re ee ee ee ee 1 9 Frame Relay SUDDOFL eg SERE Ve SE Se eg ge de Re Gee ge Eg ae Re GAN Ge ee iil 1 11 BASAAR EE OE N RE aerate estan 1 13 Inbound Traffic el GE ER OR EE N EE ech ege 1 13 DLSW Prioritization s siia pieni dee tani dell de Ge gee EN De Ge SEL wee ein 1 13 Protocol PriOritiZation von ee ee ee ee AA Ge Re AR Re ee AR Re AA ee Re ee AR ee de ee ee ee 1 14 DLSw and Related Protocols ie ee ee ee AA Ge RA AA Ge AR Re AA ee ee ee ee AA ee ee 1 14 For More Information about DLSW ees see ee ee ee AA Ge ER AA AA RR RA Ge RR Ge AA ee Re ee 1 15 Chapter 2 DLSw Implementation Notes Source Route Bridge Topologies cccececeeeeseeceeeeeeeeaeeeeeeeeeaaeseeneeeesaeeeeeeeeetsaeeeseaeees 2 1 C
78. e but are not limited to Token Ring 802 5 FDDI Ethernet S02 3 SMDS Frame Relay and other synchronous media protocols See Configuring Bridging Services for more information on the media that source route bridging supports Note Jn this manual the term LAN refers to all source route bridge types of gt DLSw Single and Dual Switch to Switch Services Bay Networks routers that you configure to support DLSw services can operate in two modes e A DLSw single switch configuration involving a single local router with two or more interfaces configured for DLSw e A DLSw dual switch to switch configuration involving paired routers each connected to an intervening TCP IP network A Bay Networks router simultaneously supports both single and dual switch operation Figure 1 1 illustrates DLSw single switch and dual switch to switch networks Configuring DLSw Services DLSw Single Switch Network Single router configured with two interfaces Cluster Controller LLC2 Token Ring Bay N ks R ay Networks Router Ethernet DLSw Dual Switch to Switch Network Cl Dual routers configured with single interfaces to TCP IP O NetBIOS Cluster Controller Server Token Ring TCP IP Network Ethernet Bay Networks Router Token Ring
79. e DLSw peer that can reach the SNA system or application you identified in the MAC Address parameter box 4 Click on OK This saves your entry to the configuration file The DLSw MAC Peer Configuration window reappears with the new entry in the list of existing DLSw MAC peers Figure 5 23 Following are descriptions of the MAC Address and MAC Peer IP Address parameters 5 40 Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Editing DLSw Parameters MAC Address None Any valid 48 bit MAC address expressed in hexadecimal notation Specifies the MAC address associated with the SNA system or application you want to reach via DLSw services Type in hexadecimal format the MAC address associated with the remote SNA system or application you want to reach via DLSw services 1 3 6 1 4 1 18 3 5 1 5 10 1 2 MAC Peer IP Address None Any valid 32 bit IP address in the form network host using dotted decimal notation Specifies the IP address of a remote DLSw peer that can reach the remote SNA system or application identified by the MAC address in the same Default MAC Peer IP Table entry The router adds this IP address to the list of configured peers in the DLSw Peer IP Table Type the IP address of the remote DLSw peer that can reach the remote SNA system or application identified by the MAC address in the same Defau
80. e RIF field is present and 0 if there is no RIF field Keep this in mind if you use a sniffer to analyze packets for their Source MAC address For example a sniffer would decode LAA with the first byte of 40 as 0x400031740001 If the RIF bit is set the hexadecimal value of the packet is 0xC0003 1740001 B 4 Criteria for DLSw Prioritization Source Routing Bridge Functional MAC Addresses Functional MAC addresses are Destination MAC addresses that always conform to the following rules e Byte 0 0xC0 e Byte 1 0x00 e The first half of byte 2 0x0 0x7 Table B 5 lists some common functional MAC addresses Table B 5 Functional MAC Addresses Function Name MAC Address MSB Identifying Bit Ethernet Address Active Monitor 0xC000 0000 0001 Byte 5 bit 7 0x030000000080 Ring Parameter 0xC000 0000 0002 Byte 5 bit 6 0x030000000040 Server Ring Error 0xC000 0000 0008 Byte 5 bit 4 0x030000000010 Monitor Configuration 0xC000 0000 0010 Byte 5 bit 3 0x030000000008 Report Server NetBIOS 0xC000 0000 0080 Byte 5 bit 0 0x030000000001 Bridge 0xC000 0000 0100 Byte 4 bit 7 0x030000008000 LAN Manager 0xC000 0000 2000 Byte 4 bit 2 0x030000000400 User defined 0xC000 0008 0000 to Byte 3 bits 0 4 0x030000100000 to 0xC000 4000 0000 Byte 2 bits 1 7 0x030002000000 Specifying Source and Destination SAP Code Ranges Table B 6 lists several SAP codes to use when specifying a range for S
81. ection between adjacent nodes where one node is a primary link station and the other node is a secondary link station SDLC supports primary and secondary link stations A primary link station does the following e Controls a data link e Issues commands e Initiates error recovery procedures A secondary link station receives commands and responds to polls initiated by the primary SDLC link station The synchronous line speed between the SDLC device and the Bay Networks router can be up to 64 Kb s You can use integrated SDLC in a point to point or multipoint topology Point to point connects one SDLC device to the SDLC port Multipoint connects several SDLC devices to the SDLC port You specify the topology when you configure SDLC on the synchronous circuit For more information on the Bay Networks SDLC implementation see Configuring SDLC Services 1 8 Data Link Switching Overview Integrated SDLC Conversion Integrated SDLC conversion enables existing SDLC traffic to share a backbone network with LAN traffic without an intervening TCP IP network Traffic enters the DLSw router as SDLC and goes out the router as LLC2 over Token Ring or Ethernet The destination endstation can reside on the Token Ring or Ethernet directly connected to that DLSw router SRB can forward the traffic through the network to a destination host or endstation In this network the local router performs the SDLC conversion and forwards the traffic acro
82. ed IP address to locally specify the DLSw peer that can reach the desired endstation The cache is not used for forwarding traffic during the first LLC2 session but will be used in new sessions with that endstation You can set a timer value that determines when NetBIOS or MAC cache entries in the router disappear The timer parameters are NetBIOS Cache Age and MAC Cache Age When the cached entry goes unused for the specified cache age time or becomes unreachable to new queries it is removed from the cache and subsequent frames are broadcast to all configured peers The router refreshes a cache entry when DLSw services establish a connection to the NetBIOS or SNA system associated with that entry The router resets the appropriate Cache Age timer to its maximum wait interval Statically Defined Remote Systems To reduce DLSw broadcasts you can define the IP addresses of DLSw peers that can reach remote systems or applications associated with specific NetBIOS names or MAC addresses This information augments any information that the router s MAC and NetBIOS caching mechanisms learn dynamically Static entries can exist in two tables e Default MAC Peer IP Table Each entry in this table contains a MAC address and the IP address of a DLSw peer which can forward packets to this MAC address e Default NetBIOS Peer IP Table Each entry in this table contains the NetBIOS name and the IP address of the DLSw peer to which this NetBIOS dev
83. ee ee ee ee ee 4 4 Adding Source Routing Parameters iss ese ede se ee Ge ee ee ee ee ee ee 4 4 Mapping Frame Relay Addresses AA 4 5 Adding Slot IP Addresses ie ee se RA ee RR AA Re ee ee AA Re ee ee ee ee 4 7 Adding DLSw Peer IP Addresses iis ee ee RA AG ee RA AA RR ee Ge ee ee 4 9 Adding a Service Access Point GAP 4 11 Editing SDLC Line Parameters and SDLC Local Devices 4 13 Subsequent DLSw Configuration cccceceeceeeeeeceeeneeeeeeeeeeaaeeeeeeeesaaeeeeeeeeeseaeeeseaeeeeeas 4 25 Chapter 5 Editing DLSw Parameters Using the Parameter Descriptions iese ee sence ee Re AA ee Re AA ee Re ee ee ee ee de ee ge ee ee 5 1 Accessing DLSw PardimeterS ees netaan es ianea ER base a ae palaces bede de GP eg ke De a ve eech 5 2 Editing DLSw Global Parameters iese ee ee ed ee ee ee ee Ge AA ee ee ee AA ee ee ee ee RA ee ee de ee 5 3 DLSw Global Parameter Descriptions iese ee ee AA ee AA ee RA ee ee ee 5 4 Enabling a DLSw Interface ees ee ee ee ee ee AA ee RA AA ee RA ee de AR de ee AA ee ee ee 5 13 Enabling a DLSw Interface Using the Edit Circuits Function iie see esse ee eg 5 14 Editing DLSw Peer IP Table Parameters idees ee ee ke de ee ee ee ee ee de ee ed Ge ee ee ee 5 17 Adding a DLSw Peer IP Table Entry iese esse see ee ee ee AA ee ee RA ee ee ee RA ee ee ee ee ee ee 5 18 Editing a DLSw Peer IP Table Entry iese sedes se ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee
84. emplate does not affect interfaces to which the template has already been applied 4 Click on Create to make a new template or select an existing template and click on Edit The Create DLS Template window or the Edit DLS Template window appears Creating and editing templates involve the same steps you use both windows in exactly the same way 5 Name the template 6 Select a DLSw criterion Figure 6 18 se Create ILS Tenplate EE EE N derd EG ED EEN EE Figure 6 18 Selecting a Predefined DL Gw Outbound Filter Criterion 6 25 Configuring DLSw Services Refer to Appendix B for information about the DLSw outbound traffic filter criteria 7 Select Action gt Add Queue Figure 6 19 EL Figure 6 19 Selecting the DLSw Queue Action 6 26 Using DLSw Prioritization The Queue Number window appears Figure 6 20 Figure 6 20 Queue Number Window 8 Enter the queue number DLSw will send traffic that meets this filter s criteria and ranges to the queue number you specify here 9 Click on OK The Filter Template Management window reappears refer to Figure 6 17 10 Click on Done to return to the DLS Priority Outbound Filters window refer to Figure 6 16 11 To apply the template click on Create 6 27 Configuring DLSw Services The Create Filter window appears Figure 6 21 EL ete Filter ll ee Figure 6 21 Create Filter Window 12 13 14 15 16 T
85. entry You add edit and delete DLSw Default MAC Peer IP Table entries in the DLSw MAC Peer Configuration window To access the DLSw MAC Peer Configuration window begin at the Configuration Manager window refer to Figure 5 1 and select Protocols gt DLSw Default MAC 5 38 Editing DLSw Parameters The DLSw MAC Peer Configuration window appears Figure 5 23 showing a list of Token Ring 802 5 MAC addresses associated with frequently accessed remote SNA systems and applications 0x2a33bff1dc2e Delete Apply Values Help E RE Default Mac Peer IP Address 98 42 61 6 E Figure 5 23 DLSw MAC Peer Configuration Window Each entry in the list is associated with the IP address of the remote DLSw peer that can reach the target SNA system or application The IP address of the currently selected table entry appears in the Default MAC Peer IP Address parameter box Adding a DLSw Default MAC Peer IP Table Entry To add a new DLSw Default MAC Peer IP Table entry begin at the DLSw MAC Peer Configuration window and 1 Click on Add The DLSw MAC Configuration window appears Figure 5 24 5 39 Configuring DLSw Services Figure 5 24 MAC Addresses in the DLSw MAC Configuration Window 2 Type the Token Ring 802 5 MAC address This is the address associated with the SNA system or application you want to reach via DLSw services 3 Type the IP address of the DLSw peer This is the IP address of th
86. es 1 3 6 1 4 1 18 3 5 1 5 5 1 3 Adding a Service Access Point SAP The DLSw SAP Configuration window Figure 4 9 displays SAP configuration information and lists the predefined SAP addresses Configuring DLSw Services Done Add Delete Apply Values Help fa __ SAP Window Figure 4 9 DLSw SAP Configuration Window 1 Click on Add The second DLSw SAP Configuration window appears Figure 4 10 pa Map eg Lance Figure 4 10 Add DLSw SAP Configuration Window 2 Enter the appropriate SAP value Refer to the parameter description that follows as a guide 3 Click on OK 4 12 Enabling DLSw Services The first DLSw SAP Configuration window reappears Repeat the instructions in this section as needed 4 Click on Done The main Configuration Manager window appears You have now completed your initial installation of DLSw If you have not already configured the IP addresses of the slots and connection to the IP network add them now Parameter SAP Default None Options An even numbered SAP address 00 04 to EC FO in hexadecimal format Function Specifies the destination service access point address SAP associated with a communication subsystem on a remote device for example on a PC or host Instructions Begin the address with Ox and specify the SAP address associated with a specific communication subsystem The SAP entries for SNA are 0x04 0x08 and OxOC The SA
87. es Following is a description of the parameters in the DLSw Interface Configuration window Parameter Default Options Function Instructions MIB Object ID Enable Enable Enable Disable Enables or disables Data Link Switching over this interface Enable Initializes the DLSw interface you added to a physical circuit Also use the Enable setting to reinitialize an existing DLSw interface disabled earlier The state of the interface depends on the up down state of the associated circuit and slot Disable Switches a DLSw interface from the enabled up state to the disabled down state Select Enable if you previously set this parameter to Disable and now want to re enable Data Link Switching over this interface Select Disable only if you want to disable Data Link Switching over this interface This cancels all active LLC2 sessions currently supported by the interface 1 3 6 1 4 1 18 3 5 1 5 2 1 2 Enabling a DLSw Interface Using the Edit Circuits Function You can also access the Enable parameter of a DLSw interface through the Edit Circuits function To do so begin at the Configuration Manager window refer to Figure 5 1 and do either of the following Select Circuits gt Edit Circuits to bring up the Circuit List window Figure 5 4 then select a circuit and click on Edit Select a connector in the Configuration Manager window to invoke the Edit Connector window Figure 5 5 then click on Edit
88. esponse Center xx through CompuServe xviii through InfoFACTS service xix through World Wide Web xix IBM 6611 Network Processor 1 2 IDBLOCK parameter 4 20 5 48 IDNUM parameter 4 20 5 49 inbound traffic filters 1 13 InfoFACTS service xix Internal Clock Speed parameter 4 15 IP Address for TCP Connection parameter 5 25 IP Address parameter 4 9 5 23 IP virtual ring 2 3 to 2 6 IP Virtual Ring parameter 4 3 4 4 5 7 5 9 IP using the circuitless IP address 5 21 K Keepalive Timer parameter 5 11 L learning capabilities 3 15 Link Address hex parameter 4 18 5 47 Link Station Retries parameter 4 24 5 53 Link Station Timer parameter 4 24 5 52 link stations roles 1 8 LLC flow control 2 17 LLC2 Frame Relay Mapping Add window 4 6 LLC2 Frame Relay Mappings window 4 5 LLC2 media support 1 3 LLC2 over Frame Relay 1 11 to 1 12 local devices adding 3 14 4 17 editing parameters for 5 44 Local MAC parameter 4 7 MAC Address parameter 5 41 MAC Cache Age parameter 5 9 MAC Peer IP Address parameter 5 41 Max Queue Buffers for Unconfig Peers parameter 6 14 Max Queue Buffers parameter 6 21 Max Queue Size for Unconfig Peers parameter 6 14 Max Queue Size parameter 6 22 Max Slot Sessions parameter 2 14 5 8 MAXDATA parameter 4 23 5 51 Maximum Package Size parameter 5 12 MAXOUT parameter 4 23 5 51 Index 4 memory requirements 2 14 multiple DLSw peers 2 11
89. etwork implements a DLSw bridge between the internal LAN and the IP virtual ring Refer to Figure 2 5 The DLSw bridge is part of the router software not an actual bridge You must however count this as one bridge in a source routing segment 2 7 Configuring DLSw Services Computing a DLSw Connection Path For SRB LAN environments the longest DLSw connection path can include up to 15 SRB LANs and 14 bridge elements Some of these elements are physical others are logical implemented in software For information on SRB LAN and bridge elements to count in other than Bay Networks DLSw capable nodes see the appropriate manufacturer s user documentation Figure 2 6 shows an end to end path that traverses two Token Ring LANs and an intervening TCP IP network A DLSw capable Bay Networks router connects each Token Ring LAN to the periphery of the TCP IP network The path shown in Figure 2 6 contains the maximum of 15 ring elements and 14 bridge elements Note that although the figure shows Token Ring LANs DLSw supports all other SRB LANs 2 8 8 Bay Networks Router DLSw Bridge Figure 2 6 7 6 5 4 3 CH KLK KEKEKE CRD ET 7 6 5 4 3 a ah Te IP Virtual Ring el i DLSw i 1 Bridge DLSw Implementation Notes 2 TCP IP Network 2 3 4 5 6 7 8 ed Caf KEEKEEKE E 3 4 5 6 7 End to End Path in a DLSw capable Token Ring 802 5 Network For mixed topologies SRB and non SRB LANs an
90. evice parameters click on Done to return to the Configuration Manager window DLSw Local Devices Parameter Descriptions This section describes the DLSw Local Devices parameters you can customize from the DLS Local Device Configuration window 5 46 Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Editing DLSw Parameters Link Address hex None Any valid hexadecimal link station address from 0x01 to OxFE Specifies the address of the link station Type Ox followed by the link station address N A Disable Enable Enable Disable Enables or disables the DLSw local device Set to Disable if you want to temporarily disable the local device rather than delete it Set to Enable if you want to reinitialize the local device 1 3 6 1 4 1 18 3 5 1 5 12 1 2 PU Name None Any valid 8 byte ASCII name Specifies the name of the adjacent link station This name uniquely identifies the station for statistics and Alert messages Type the 8 byte ASCII link station name 1 3 6 1 4 1 18 3 5 1 7 5 1 32 5 47 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID PU Type None T2 0 T2 1 Specifies the ty
91. for DLSw terminates Enter the appropriate IP address If a circuitless IP address is configured use that address for this parameter 1 3 6 1 4 1 18 3 5 1 5 3 1 3 Adding DLSw Peer IP Addresses The DLSw Peer Configuration window Figure 4 7 displays a list of the peer IP addresses you have added 4 9 Configuring DLSw Services Add Delete Figure 4 7 DLSw Peer Configuration Window 1 Click on Add The second DLSw Peer Configuration window appears Figure 4 8 Lance Poor JP men a Figure 4 8 Add DLSw Peer Configuration Window 2 Enter the appropriate peer IP address Use the following parameter description as a guide 3 Click on OK 4 10 Enabling DLSw Services This accepts the peer IP address and displays the first DLSw Peer Configuration window Add additional peers by clicking on Add and repeating the procedure as many times as needed 4 Click on Done Parameter Default Options Function Instructions MIB Object ID Peer IP Address None Any valid 32 bit IP address of the form network host using dotted decimal notation Specifies the IP address of a remote DLSw peer Once added to the DLSw peer table this address defines a configured peer on the local router Configured peers receive all DLSw related broadcast frames for a given router or network processor Enter the IP address at which the configured peer will receive all DLSw related broadcast fram
92. ges between LANs The logical elements implemented in router software are the IP Virtual Ring the internal LANs and the DLSw bridges You must count all LAN and bridge elements in a path to avoid exceeding 2 1 Configuring DLSw Services s The number of SRB LAN and bridge elements allowed in a source routing network e The number of SRB LAN and bridge elements allowed along a DLSw connection path that includes SRB segments Counting SRB LANs and Bridges A standard source routing network can include up to eight SRB LANs linked by seven bridges Figure 2 1 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 Figure 2 1 Maximum Ring and Bridge Hop Counts in a Source Routing Network The term source routing segment refers to a linked series of rings and bridges attached to your network Figure 2 2 2 2 DLSw Implementation Notes TCP IP Network i sl ource routing segment r E T DLSw capable Routers KEY r R Ring SRB Segment B Bridge Figure 2 2 DLSw Capable Routers on an IP Backbone Counting the IP Virtual Ring The DLSw peers at the periphery of a TCP IP network collectively use an ZP virtual ring which provides compatibility with LAN requirements Figure 2 3 2 3 Configuring DLSw Services Bay Networks Router Figure 2 3 m x Cm gt DLSw Peer TC
93. gure the DLSw priority filters begin by displaying the DLS Priority Outbound Filters window 1 From the Configuration Manager window select Protocols gt DLSw Prot Prioritization Outbound 2PP Traffic Filters Figure 6 15 Configuration Motio SNMP Agent LOCAL FILE File Mase Zen mvt use2t His cfg Model Backbone Lirk HIH Version 44 00 Deacription 5450 Quad Ethernet S710 Dual Toker Ring 4716p 5740 Dual Sync Single Token Eepty Slot Systes Resource Hodule Figure 6 15 Selecting the DLS Priority Outbound Filters Window 6 22 Using DLSw Prioritization The DLS Priority Outbound Filters window appears Figure 6 16 Note See the later section Using the DLSw Peer Configuration Window for another way to access the DLS Priority Outbound Filters window Fi DLS Priority Outbound Filters Done IN Filter Enable Filter Name Figure 6 16 DLS Priority Outbound Filters Window This window shows any existing outbound traffic filters for DLSw peers regardless of whether or not the filters are currently active on the peers 2 Click on Template The Filter Template Management window appears Figure 6 17 6 23 Configuring DLSw Services If you are familiar with the Template Management window for WAN protocols you create the templates for the DLSw priority filters window in the same way See Configuring Traffic Filters and Protocol Prioritization for details about using the Priority Outbo
94. h operation 3 8 to 3 12 for SDLC operation 3 12 to 3 15 for single switch operation 3 5 to 3 8 optional 3 15 to 3 17 configuration overview 3 1 to 3 15 Default NetBIOS Peer IP Table parameters 5 32 to 5 38 defaults A 1 to A 4 enabling DLSw 4 1 inbound traffic filters 1 13 interface parameters 5 13 to 5 17 LLC2 media support 1 3 Local Devices parameters 4 18 to 4 25 5 44 to 5 53 media support for 1 3 networking overview 1 2 to 1 3 Peer IP Table parameters 5 17 to 5 21 peers defined 3 9 defining in a TCP IP network 3 9 to 3 11 multiple 2 11 unconfigured 3 11 performance considerations 2 18 priority queues 6 3 protocol prioritization 1 13 related publications 1 15 remote NetBIOS SNA systems 3 15 to 3 17 SAP table parameters 5 26 to 5 32 SAPs defined 3 5 SDLC media support 1 3 single and dual switch services 1 3 to 1 4 Slot IP Table parameters 5 21 to 5 26 DLSw Default MAC Peer IP Table Parameters MAC Peer IP Address 5 41 DLSw Default MAC Peer IP Table parameters Default MAC Peer IP Address 5 43 MAC Address 5 41 DLSw default NetBIOS peer IP parameters NetBIOS Name 5 35 NetBIOS Peer IP Address 5 35 DLSw Default NetBIOS Peer IP Table parameters Default NetBIOS Peer IP Address 5 37 DLSw default settings A 1 DLSw global parameters Enable 5 5 IP Virtual Ring 5 7 Keepalive Timer 5 11 Max Cache Age 5 9 Max Slot Sessions 5 8 Maximum Package Size 5 12 NetBIOS Cache Age 5 9 Packag
95. he routers Only IP must be configured on these interfaces When communicating using single switch mode DLSw is configured on the connecting interfaces Note that either link from Router A to Router C can be used to transport DLSw traffic IP determines which link will be used for these routers to communicate Configuring DLSw Services Router A 192 32 10 1 LAN NetBIOS Gateway Main Frame Server jel e BV ch NetBIOS Client PPP AS 400 Router B 192 32 20 2 Router C 192 32 30 2 192 32 30 1 Frame Relay Frame Relay 192 32 40 1 192 32 40 2 Circuitless 192 32 200 1 m SOT Disoro Frame Relay Circuitless EI 192 32 100 1 Front End SDLC KS Pocesser Control Unit Router B Router A Router C Peer IP Table Peer IP Table Peer IP Table No Entries 192 32 200 1 192 32 100 1 Figure 3 5 Sample Network with Peer IP Table Definitions Configuration Objects for SDLC This section describes the objects you define when you configure DLSw SDLC attached devices on the router specifically e SDLC line parameters e DLSw Local Devices SDLC Line Parameters DLSw uses the SDLC Line Parameters to determine the characteristics of the link Y
96. i Ulica Wess K Dtamlt Lippert zft ee Fup ly valur i Helps Luss Protocol Priority Hes Queue foFfers Heo Queue Sime Figure 6 9 Peer Queue Configuration Window The Peer Queue Configuration window summarizes the priority queue status for all DLSw peers The scroll box lists each peer and indicates whether it uses the default or a specific queue configuration All of the DLSw peers in Figure 6 9 use the default queue configuration The parameter boxes at the bottom of the screen show protocol prioritization as currently Disabled or Enabled for the selected peer and list that peer s queue configuration information queue buffers and size 2 Select the individual peer address on which to configure priority queues 3 Click on Queues in the Peer Queue Configuration window 6 16 Using DLSw Prioritization The Add Edit Delete Queues window appears Figure 6 10 Figure 6 10 Add Edit Delete Queues Window 4 Click on Add The Add Queue window appears Figure 6 11 Chisum Number Gian Berk dii Perot Figure 6 11 Add Queue Window 5 Enter a queue number The first queue must be queue number zero You can number additional queues from 1 to 9 You do not need to number them in sequence although doing so may help you keep track of the queues on a peer 6 17 Configuring DLSw Services 6 Enter a bandwidth The bandwidth for queue number zero must be greater than 0 You can assign
97. ice is connected In the local router s Default NetBIOS Peer IP Table enter the IP address of the remote peer associated with any remote NetBIOS application you need to reach through DLSw services Each entry in this table associates the name of a NetBIOS client with the IP address of the DLSw peer that can reach that client 3 16 DLSw Configuration Overview In the router s Default MAC Peer IP Table enter the peer IP address of the DLSw peer associated with any remote SNA system or application that you need to reach through DLSw services Each entry in this table associates the MAC address for an SNA system with the IP address of the DLSw peer that can reach that system Unlike dynamically learned entries statically defined entries remain unless you delete them from the Default NetBIOS Peer IP Table or the Default MAC Peer IP Table See Chapter 5 for more information on editing the Default NetBIOS Peer IP Table and the Default MAC Peer IP Table 3 17 Chapter 4 Enabling DLSw Services This chapter describes how to enable DLSw services It assumes you have read Configuring Routers and completed the following steps 1 Opened a configuration file 2 Specified router hardware if this is a local mode configuration file 3 Selected the link or net module connector on which you are enabling DLSw When you enable DLSw you are required to specify some of the parameters the Configuration Manager supplies default values for
98. ices e DLSw Max Slot Sessions parameter allowing the network administrator to limit the number of LLC2 stations per slot See Chapter 5 for instructions on accessing and editing the Max Slot Sessions DLSw global parameter e Technician Interface commands allowing the user to limit the total memory used by DLSw 2 14 DLSw Implementation Notes For more information on DLSw memory usage contact Bay Networks Technical Response Center TCP Considerations TCP timers allow you to configure DLSw to periodically give TCP data to transmit if a connection is inactive for a period of time The mechanism by which TCP determines a lost connection either a failed link with no rerouting possible or the remote router is unavailable is based on TCP attempts to deliver this data If TCP does not receive an acknowledgment after a series of retries it declares the connection down and informs DLSw DLSw then manages the currently active sessions There are two main configuration parameters associated with DLSw timers e DLSw Keepalive Time e TCP Max Retransmission Timeout Configuring TCP Services describes the Max Retransmission Timeout parameter This section describes the Keepalive Time and the Max Retransmission Timeout parameters DLSw Keepalive Time The DLSw Keepalive Time parameter ensures that the TCP connection to a remote router is active You enable the parameter by specifying a nonzero value The Keepalive Time setting deter
99. icitly except by acceptance of an order for either Software or for a Bay Networks product Equipment that is packaged with Software Each such license is subject to the following restrictions 1 Upon delivery of the Software Bay Networks grants to licensee a personal nontransferable nonexclusive license to use the Software with the Equipment with which or for which it was originally acquired including use at any of licensee s facilities to which the Equipment may be transferred for the useful life of the Equipment unless earlier terminated by default or cancellation Use of the Software shall be limited to such Equipment and to such facility Software which is licensed for use on hardware not offered by Bay Networks is not subject to restricted use on any Equipment however unless otherwise specified on the Documentation each licensed copy of such Software may only be installed on one hardware item at any time Licensee may use the Software with backup Equipment only if the Equipment with which or for which it was acquired is inoperative Licensee may make a single copy of the Software but not firmware for safekeeping archives or backup purposes Licensee may modify Software but not firmware or combine it with other software subject to the provision that those portions of the resulting software which incorporate Software are subject to the restrictions of this license Licensee shall not make the resulting software available
100. iguration sequence DLSw Configuration Sequence for Token Ring 802 5 or Other Source Route Figure 3 1 Bridge Networks Configuring DLSw Services Are you defining the first DLSw interface on the router Yes No subsequent DLSw interface Select a circuit Ethernet 802 3 or Frame Relay Configure DLSw global parameters Y Y Configure source routing ME Use source route Yes Configure source routing global parameters encapsulation interface parameters No No Y Y Configure source routing Enter Frame Relay interface parameters mapping information H y gt Define DLSw slots lt Y Define DLSw peers Y Define DLSw SAP addresses d Y Site Manager automatically Site Manager automatically enables global TCP services gt enables a DLSw interface if not already enabled on the selected circuit End of mandatory configuration steps Configuration path for the first DLSw interface on the router Configuration path for the second and subsequent DLSw interface on the router If you already configured source routing on your router Site Manager does not prompt you to configure source routing global parameters during the DLSw configuration sequence Figure 3 2 DLSw Configuration Sequence for Ethernet 802 3 or Frame Relay Network 3 4
101. ime DLSw packaging is important for networks with many LAN WAN segments and for networks with slow WAN links For information on configuring DLSw packaging parameters refer to Chapter 5 2 18 Chapter 3 DLSw Configuration Overview This chapter provides general information about configuring DLSw on Bay Networks routers including e DLSw session setup overview e Site Manager roadmaps to configuring DLSw e Configuration objects for single switch DLSw e Configuration objects for dual switch DLSw e Configuration objects for SDLC e Optional configuration objects DLSw Session Setup Overview Before configuring DLSw you should be familiar with how DLSw establishes sessions between network endpoints To establish SNA or NetBIOS sessions between endpoints devices Bay Networks routers with DLSw enabled execute the following sequence of events e Upon receiving a TEST POLL or similar frame from an attached endstation the receiving slot performs the following Forwards the packet to all other slots defined in the DLSw Slot Table Converts the TEST POLL frame into an SSP CANUREACH command Searches the appropriate cache to determine if the remote location is known If the remote location is already in the cache the CANUREACH is forwarded only to this remote location If the remote loccation is not in the cache DLSw forwards the CANUREACH to all remote routers specified in the DLSw Peer IP Table if this table exis
102. in the DLSw Peer IP Table Type the IP address of the remote DLSw peer that can reach the remote SNA system or application identified by MAC address and currently selected in the DLSw MAC Peer Configuration window 1 3 6 1 4 1 18 3 5 1 5 10 1 3 Deleting a DLSw Default MAC Peer IP Table Entry To delete a DLSw Default MAC Peer IP Table entry from the router configuration start at the DLSw MAC Peer Configuration window Figure 5 26 1 Select the entry to delete 2 Click on Delete 0x2a33bff1dc2e Done Add Delete Apply Values Help KN EE Default Mac Peer IP Address Figure 5 26 198 42 61 6 Deleting a DLSw Default MAC Peer IP Table Entry 5 43 Configuring DLSw Services The system software deletes the entry you select and the entry disappears from the list 3 Click on Done The Configuration Manager window reappears Editing DLSw Local Devices Parameters DLSw Local Devices parameters let you map SDLC devices to LAN MAC and SAP addresses This section assumes that you have already added local devices Chapter 3 describes the different ways that you can add local devices You should read this section if you want to edit the local device configurations To access DLSw Local Devices parameters begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw gt Local Devices The DLS Local Device Configuration window appears Figure 5 27 5 4
103. ing 802 5 or Other Source Route Bridge Networks iss ee ee Re AA ee ee 3 3 DLSw Configuration Sequence for Ethernet 802 3 or Frame Relay Network 3 4 Sample Network with SAP Table Definitions ees ee ee ee ke ee 3 6 Sample Network with Slot Table Definitions ee eee Re ee 3 8 Sample Network with Peer IP Table Definitions 3 12 DLSw Global Parameters WindOW cccccceeeseeeeeeeeeeeeeeeeeeeeeeaeeseaees 4 3 Source Route Encapsulation Dialogue BOX iese iese ee ee ee ee AA ee ee 4 4 LLC2 Frame Relay Mappings Window iese ee ee ee RA AA ee ee 4 5 xi xii Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9 Figure 4 10 Figure 4 11 Figure 4 12 Figure 4 13 Figure 4 14 Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 Figure 5 5 Figure 5 6 Figure 5 7 Figure 5 8 Figure 5 9 Figure 5 10 Figure 5 11 Figure 5 12 Figure 5 13 Figure 5 14 Figure 5 15 Figure 5 16 Figure 5 17 Figure 5 18 Figure 5 19 Figure 5 20 Figure 5 21 Figure 5 22 Figure 5 23 Figure 5 24 LLC2 Frame Relay Mapping Add Window 4 6 DLSw Slot Configuration Window 4 8 Add DLSw Slot Configuration Window ccccceeeceeeeeeeeeeeeteeeeeneeeeeaees 4 8 DLSw Peer Configuration Window ee ee RA AA ee Ge AA ee 4 10 Add DLSw Peer Configuration Window ees ee ee ER RA ee ee 4 10 DLSw SAP Configuration Window 4 12 Add DLSw SAP Configuration Window
104. ing Threshold 5 12 Packaging Timeout 5 12 Reject Unconfigured Peers 5 10 TCP Window Size 5 6 Virtual Ring MTU 5 8 DLSw Interface Configuration window 5 13 DLSw interface parameters Enable 5 14 Index 2 DLSw local devices parameters Canureach Retries 4 24 5 52 Canureach Timer 4 23 5 52 Destination Host MAC hex 4 22 5 50 Destination Host SAP hex 4 22 5 51 Disable 4 19 5 47 Link Address hex 4 18 5 47 Link Station Retries 4 24 5 53 Link Station Timer 4 24 5 52 MAXDATA 4 23 5 51 MAXOUT 4 23 5 51 PU IDBLOCK 4 20 5 48 PU IDNUM 4 20 5 49 PU Name parameter 4 19 5 47 PU Type 4 19 5 48 SDLC Receive Credit 4 25 5 53 SDLC Transmit Credit 4 25 5 53 Source Virtual MAC hex 4 21 5 50 Source Virtual SAP hex 4 22 5 50 XID Format 4 21 5 49 DLSw MAC Peer Configuration window 5 39 5 42 5 43 DLSw NetBIOS Configuration window 5 34 DLSw NetBIOS Peer Configuration window 5 33 5 36 5 38 DLSw packaging 2 18 configuring 5 12 DLSw parameters using descriptions for 5 1 DLSw Peer Configuration window 4 10 5 18 5 19 5 20 DLSw Peer IP Table parameters Peer IP Address 5 19 DLSw Protocol Prioritization Default Queue Bandwidths parameter 6 14 Max Queue Buffers for Unconfig Peers parameter 6 14 Max Queue Buffers parameter 6 21 Max Queue Size for Unconfig Peers parameter 6 14 Max Queue Size parameter 6 22 PP for Unconfigured Peers parameter 6 13 Protocol Prio
105. is complete For information about configuring a circuit with DLSw and setting the slot peer and SAP parameters refer to the earlier chapters in this manual Protocol Prioritization Overview Outbound traffic filters act on packets that the router sends out a synchronous interface to a wide area network Outbound traffic filter actions let you direct traffic into delivery queues of varying precedence Applying a priority queue action to an outbound filter is called protocol prioritization These outbound filters are often called priority filters As a router operates network traffic from a variety of sources converges at an interface Without protocol prioritization the router transmits packets in a first in first out FIFO order Site Manager s Protocol Prioritization features allow you to instruct the router to use a different transmit order for specified ranges of packets on an individual interface 6 1 Configuring DLSw Services With protocol prioritization the router sorts traffic into queues according to priority filters that you configure For most traffic you configure priority filters on an outbound interface If a queue is full or you have configured an outbound drop filter the router discards clips the traffic For DLSw traffic you can also create priority queues for DLSw peers the router cannot clip DLSw traffic The router holds the sorted packets in priority queues It then uses a dequeuing allocation algorithm
106. ll apply for interoperability purposes Licensee must notify Bay Networks in writing of any such intended examination of the Software and Bay Networks may provide review and assistance Notwithstanding any foregoing terms to the contrary if licensee licenses the Bay Networks product Site Manager licensee may duplicate and install the Site Manager product as specified in the Documentation This right is granted solely as necessary for use of Site Manager on hardware installed with licensee s network This license will automatically terminate upon improper handling of Software such as by disclosure or Bay Networks may terminate this license by written notice to licensee if licensee fails to comply with any of the material provisions of this license and fails to cure such failure within thirty 30 days after the receipt of written notice from Bay Networks Upon termination of this license licensee shall discontinue all use of the Software and return the Software and Documentation including all copies to Bay Networks Licensee s obligations under this license shall survive expiration or termination of this license Bay Networks Inc 4401 Great America Parkway Santa Clara CA 95054 8 Federal Street Billerica MA 01821 Contents About This Guide ale le xvii BeTOre lei AR N ER OR EE EE RR RE xviii Bay Networks Customer Support iis ses ee AA ee AR AA ee RA ee ee AR ee ee ee Re ee xviii eu xviii Dle EE xix World Wid
107. lt MAC Peer IP table entry 1 3 6 1 4 1 18 3 5 1 5 10 1 3 Editing a DLSw Default MAC Peer IP Table Entry You can edit only the Default MAC Peer IP Address parameter in the Default MAC Peer IP Table To edit the DLSw MAC Peer IP Address begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw Default MAC The DLSw MAC Peer Configuration window appears Figure 5 25 Select the entry to edit Click on the Default MAC Peer IP Address parameter window and enter a new address 5 41 Configuring DLSw Services 4 Click on Apply This saves your change to the router configuration file Ox2a33bffidc2e Done Add Delete Apply Values Help fel Default Mac Peer IP Address 198 42 61 6 le Figure 5 25 Saving a DLSw Default MAC Peer IP Table Entry 5 Click on Done The Configuration Manager window reappears Following is a description of the Default MAC Peer IP Address parameter 5 42 Parameter Default Options Function Instructions MIB Object ID Editing DLSw Parameters Default MAC Peer IP Address None Any valid 32 bit IP address in the form network host using dotted decimal notation Specifies the IP address of a remote DLSw peer that can reach the SNA system or application identified by MAC address and currently selected in the DLSw MAC Peer Configuration window The router adds this IP address to the list of configured peers
108. lts window Use this window to enable disable or change the default configuration of priority queues for configured and unconfigured DLSw peers This section shows how to e Enable the default priority queues for all configured DLSw peers e Enable the default priority queues for unconfigured peers e Customize the default priority queue configuration Note The steps in this section assume that DLSw is already configured on an interface and that the Peer Table is complete For information about configuring a circuit with DLSw and setting the slot peer and SAP parameters refer to earlier chapters 6 8 Using DLSw Prioritization Enabling the Default Queues for Configured and Unconfigured Peers Begin by displaying the DLSw Protocol Prioritization PP Global Parameters window 1 From the Configuration Manager window select Protocols gt DLSw Prot Prioritization Outbound gt Global see Figure 6 2 Configuration Mode local SNMP Agent LOCAL FILE File Mase tap_mnt usrzi l Backbone Lirk o0 Made HIH Version 4 Deacription 5450 Quad Ethernet 5710 Dual Token Ring 4 16Mb Empty Slot Eepty Slot Systema Resource Module Figure 6 2 Selecting DLSw Protocol Prioritization The Global DLSw PP Parameters Defaults window appears Figure 6 3 Note See the section Using the DLSw Peer Configuration Window near the end of this chapter for another way to access the Global DLSw PP Parameters Defaults wi
109. m the Configuration Manager window select Protocols gt DLSw Prot Prioritization Outbound 2 Peer Queue Entries refer to Figure 6 8 The Peer Queue Configuration window appears see Figure 6 13 2 Select the peer from the scroll box 6 19 Configuring DLSw Services 3 Change the value of Protocol Priority to ENABLED or DISABLED 4 Click on Apply 5 Click on Done Customizing Specific DLSw Peer Queues Once you create and enable peer specific queues the DLSw peer in question uses default values that dictate how the priority queues work You can change these values according to your network traffic needs 1 From the Configuration Manager window select Protocols gt DLSw Prot Prioritization Outbound 2 Peer Queue Entries The Peer Queue Configuration window appears Figure 6 14 Dione App ly Talum ia 3 3 3 3 Oefeult huur E E 4 4 4 4 Default Dumura Bends ict Help Lhe ue NARE HE OF210 4 10 K H r Protocol Priority Coop E Ha Queue HiFiera Heo Queue Size Figure 6 14 Peer Queue Configuration Window 2 Edit the Peer Queue parameters you want to change using the following descriptions as guidelines 3 Click on Apply 4 Click on Done 6 20 Using DLSw Prioritization Peer Queue Configuration Parameter Descriptions Use the following descriptions as guidelines when you configure parameters on the Peer Queue Configuration window Parameter Default Options
110. mines when to send data into the TCP pipe Since only one packet is sufficient to initiate the TCP retransmission procedure short intervals less than 30 seconds will use additional memory and resources unnecessarily Low values such as 1 second do not significantly decrease notification time but significantly increase CPU and WAN bandwidth utilization because each keepalive sends data into the TCP connection awaiting acknowledgment by the remote router In busy networks the DLSw keepalive is not necessary Frequent traffic for TCP transmission performs the same function as a keepalive setting For example frequent NetBIOS broadcast traffic functions as a TCP keepalive The Keepalive Time parameter appears on the Edit DLSw Global Parameter window 2 15 Configuring DLSw Services TCP Max Retransmission Timeout The TCP Max Retransmission Timeout parameter setting determines the maximum time between successive retransmissions TCP performs calculations that increase the time between data retransmissions to minimize network loading during peak periods when there is an increased risk of lost data TCP starts a minimum retransmission time before increasing to the Max Retransmission Timeout setting with successive retransmissions Decreasing the Max Retransmission Timeout decreases the notification time by reducing the time between intervals This also slows network traffic in congested connected networks In large networks with
111. n Example set Bay Networks Trap Monitor Filters XX Acronyms vertical line 1 About This Guide Indicates that you enter only one of the parts of the command The vertical line separates choices Do not type the vertical line when entering the command Example If the command syntax is show at routes nets you enter either show at routes or show at nets but not both Ordering Bay Networks Publications To purchase additional copies of this document or other Bay Networks publications order by part number from Bay Networks Press at the following numbers You may also request a free catalog of Bay Networks Press product publications Phone FAX U S Canada FAX International APPN DLSw FDDI FEP FRAD FIFO IP LLC MAC MTU SAP SDLC SNA SRB SSP 1 800 845 9523 1 800 582 8000 1 916 939 1010 Advanced Peer to Peer Networking Data Link Switching Fiber Distributed Data Interface front end processor Frame Relay Access Device first in first out Internet Protocol logical link control media access control Maximum Transmission Unit service access point Synchronous Data Link Control Systems Network Architecture source routing bridge Switch to Switch Protocol xxi Configuring DLSw Services TCP IP Transmission Control Protocol Internet Protocol VTAM Virtual Telecommunications Access Method XID exchange identification xxii Chapter 1 Data Link Switching Overview This chap
112. n low speed lines running NetBIOS you should allocate 20 of the total bandwidth due to endstation timing For example the following specifies 10 of bandwidth allotted to each of 10 queues 10 10 10 10 10 10 10 10 10 10 1 3 6 1 4 1 18 3 5 1 5 1 19 6 14 Configur Using DLSw Prioritization ing Peer Specific Priority Queues You create the priority queue configuration for all configured and unconfigured DLSw peers using the Global DLSw PP Parameters Default window refer to Figure 6 7 You customize priority queues for particular configured DLSw peers using the Peer Queue Configuration window Note Peer specific queue configurations take precedence over the default DLSw priority queue configuration Priority Queues for a Specific DLSw Peer Figure 6 8 Begin by displaying the Peer Queue Configuration window 1 From the Configuration Manager window select Protocols gt DLSw Prot Prioritization Outbound 2 Peer Queue Entries LOCAL FILE d en mnt use2t Backbone Link gt 48 00 Deacription 5450 Quad Ethernet 5710 Dual Token Ring 4716Mb 5740 Dual Sync Single Token Eepty Slot Syotes Resource Module Selecting the Peer Queue Entries Window 6 15 Configuring DLSw Services The Peer Queue Configuration window appears Figure 6 9 Note See the later section Using the DLSw Peer Configuration Window for another way to access the Peer Queue Configuration window Dione z r
113. n the data path between endstations may affect end to end performance Performance delays increase for DLSw configurations that include more than one IP virtual ring in any end to end connection path For more information on DLSw configurations that include multiple IP virtual rings in an end to end connection path contact the Bay Networks Technical Response Center You can make determinations of DLSw latency based on your experience with specific SNA and NetBIOS applications Consider also the inherent latency of the physical data links that interconnect each pair of DLSw peers DLSw Packaging In DLSw dual switch configurations packaging allows multiple DLSw frames consisting of user data and the DLSw SSP header to be placed into a single TCP IP frame This provides two performance benefits e Reduces the number of TCP IP encapsulation program executions This results in fewer router cycles when processing DLSw information e Reduces the amount of TCP IP overhead per DLSw frame Instead of 52 bytes of overhead per information frame 32 for TCP 20 for IP a single TCP IP package carries multiple frames With DLSw packaging a packet may be delayed for a short period while the router waits to see whether there are any more packets routed to the same destination peer This delay may increase network latency However the performance benefits increase the number of packets that can be delivered across the network increasing response t
114. nd disclosure are as set forth in the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 Trademarks of Bay Networks Inc ACE AFN BCN BLN BN CN FRE LN Optivity SynOptics SynOptics Communications Wellfleet and the Wellfleet logo are registered trademarks and AN ANH ASN BaySIS BayStack BCNX BLNX BNX EZ Internetwork EZ LAN FN PathMan PhonePlus PPX Quick2Config RouterMan SPEX Bay Networks Bay Networks Press the Bay Networks logo and the SynOptics logo are trademarks of Bay Networks Inc Third Party Trademarks All other trademarks and registered trademarks are the property of their respective owners Statement of Conditions In the interest of improving internal design operational function and or reliability Bay Networks Inc reserves the right to make changes to the products described in this document without notice Bay Networks Inc does not assume any liability that may occur due to the use or application of the product s or circuit layout s described herein Portions of the code in this software product are Copyright 1988 Regents of the University of California All rights reserved Redistribution and use in source and binary forms of such portions are permitted provided that the above copyright notice and this paragraph are duplicated in all such forms and that any documentation advertising materials and other materials related to such distribution and use acknowledge that such
115. ndow 6 9 Configuring DLSw Services Global DLSw PP Parameters Defaults Values Help Protocol Priority PP EISABLED PP for Unconfigured Peers ENABLED Max Queue Buffers for Unconfig Peers 50 Max Queue Size for Unconfig Peers 16000 Default Bandwidths Q0 Q01 Q9 60 40 0 0 0 0 0 0 0 0 Figure 6 3 Global DLSw PP Parameters Defaults Window 2 Select Protocol Priority PP and click on Values The Protocol Priority PP Values Selection window appears Figure 6 4 Protocol Priority PP EHAHLEI l AHLEN LR Cancel Figure 6 4 Enabling Protocol Prioritization on DLSw Peers 3 Select ENABLED 4 Click on OK The Global DLSw PP Parameters Defaults window reappears Figure 6 3 6 10 Using DLSw Prioritization 5 To also use the default priority queue structure for all unconfigured peers change the value of the PP for Unconfigured Peers box to ENABLED Figure 6 5 ee PP fer Unecoofigured Pear Ma DI Figure 6 5 Enabling PP for Unconfigured Peers 6 Click on OK The Global DLSw PP Parameters Defaults window reappears refer to Figure 6 3 7 Decide whether to use the default queue configuration or customize the queue to suit your network 8 To use the default queue configuration click on OK to exit Site Manager asks you to confirm Figure 6 6 9 Enable Al DLSw Peers IE Figure 6 6 Enabling Protocol Prioritization for All DLSw Peers 9 To cu
116. ndow appears Figure 5 9 5 18 Editing DLSw Parameters 2 Type a value for the Peer IP Address parameter Note Do not enter the IP address of any DLSw peer slot that resides in the local router Wee L ads Pie lp sa 197 42 61 Figure 5 9 IP Address in DLSw Peer Configuration Window 3 Click on OK This saves the new entry The DLSw Peer Configuration window reappears refer to Figure 5 8 with the new entry in the list of existing peers 4 Click on Done The Configuration Manager window reappears Parameter Peer IP Address Default None Options Any valid 32 bit IP address in the form network host using dotted decimal notation Function Specifies the IP address of a remote DLSw peer Adding this address to the DLSw IP Peer Table defines a configured peer to the local router Configured peers receive all DLSw related broadcast frames from the local router Instructions Type the IP address at which the configured peer should receive all DLSw related broadcast frames MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 5 13 5 19 Configuring DLSw Services Editing a DLSw Peer IP Table Entry You cannot edit the Peer IP Address parameter associated with an existing DLSw Peer IP Table entry To change the IP address of an entry proceed as follows 1 Delete the existing entry from the DLSw Peer IP Table See the following section Deleting a DLSw Peer IP Table Entry 2 Using the a
117. o 19200 bps An IBM 3274 with a V 35 interface supports up to 56 Kb s An IBM 3174 with a V 24 RS 232 interface supports up to 19200 bps An IBM 3174 with a V 35 interface and running Licensed Internal Code C supports up to 256 Kb s Sync Line Coding Use this parameter to set the same line coding value for all devices attached to the same SDLC link The network administrator can define the line coding for most SNA control units The Sync Line Coding parameter does not operate with the Bay Networks AFN and the Quad Sync module For information on configuring the SDLC line parameters refer to Chapter 4 3 13 Configuring DLSw Services Local Devices DLSw uses Local Device entries to define SDLC attached SNA physical units PUs to the router NetBIOS does not support SDLC attached devices To take advantage of integrated SDLC services in DLSw you must define the SDLC devices that you want to appear as natively attached to the LAN When you define such devices you map the devices to LAN MAC and SAP addresses You can add Local Devices at the following times When you add SDLC to a synchronous circuit and add the DLSw protocol to that circuit When you edit a synchronous circuit that already has SDLC and DLSw on it When you edit DLSw interface parameters In this case the interface whose parameters you edit must already have at least one local device defined on it Several Local Device parameters m
118. of the Request to Send RTS signal on the interface For manual dial modems 2 wire you should set this parameter to Enabled For leased modems 4 wire the setting should be Disabled Instructions Click on Values and select Enabled or Disabled MIB Object ID 1 3 6 1 4 1 18 3 4 5 1 16 3 Click on OK The Select Protocols window appears Figure 4 12 Select Protocols SEH Figure 4 12 Select Protocols Window 4 Select DLSw and click on OK 4 16 Enabling DLSw Services The DLS Local Device Configuration window appears Figure 4 13 Apply Valuers os Helpa d a Disable PU Home P Type LIRIEK 3 hex digita OCT 5 het digite Sid Format Figure 4 13 DLS Local Device Configuration Window 5 Click on Add The Local Device Configuration screen appears Figure 4 14 To take advantage of integrated SDLC services in DLSw you must define the SDLC devices that you want to appear as natively attached to the LAN When you define such devices you map the devices to LAN MAC and SAP addresses 4 17 Configuring DLSw Services Local Device Configuration Cancel OK Values Help Link Address hex PU Name PU Type IDBLOCK 3 hex digits IDNUM 5 hex digits Xid Format Source Virtual MAC Chex Destination Host MAC hex Figure 4 14 Local Device Configuration Window Parameter Link Address hex Default None Range Any valid hexadecimal
119. on the network Chapter 2 An overview of the configuration process for DLSw using the Configuration Manager software Chapter 3 Instructions for enabling DLSw on Bay Networks routers Chapter 4 Instructions for editing DLSw global and interface parameters and for configuring DLSw Local Devices Peer Slot and SAP tables Chapter 5 Information on prioritizing DLSw traffic configuring priority queues for DLSw peers and applying DLSw prioritization using outbound filters Chapter 6 A list of DLSw parameters and their default settings in the Configuration Manager Appendix A A list of predefined criteria and reference points for user defined criteria for DLSw prioritization Appendix B Written for system and network managers this guide describes how to configure the Bay Networks implementation of DLSw to suit your environment xvii Configuring DLSw Services Before You Begin Before using this guide you must complete the following procedures e Open a configuration file e Specify the router hardware if this is a local mode configuration file e Select the link or net module connector on which you are enabling DLSw See Configuring Routers for instructions Bay Networks Customer Support Bay Networks provides live telephone technical support to our distributors resellers and service contracted customers from two U S and three international support centers If you have purchased your Bay Networks product from
120. ou can establish DLSw peer configurations that include only Bay Networks routers or a mix of Bay Networks routers and other RFC 1434 compliant devices Configured Peers A configured peer is a remote Data Link Switch represented by an IP address that is predefined in the local router You define a configured peer by specifying its unique IP address in the Site Manager DLSw Peer IP Table IP addresses in the local router s Peer IP Table must also appear in the Slot Table of a remote router A configured peer can receive broadcast frames directly from DLSw peers in a local router The local router issues broadcast frames triggered by client demand for connection services Responses to these broadcasts enable the local router to e Identify DLSw peers that can reach the requested remote NetBIOS or SNA system e Manage open restart and close TCP connections to the DLSw peer that can reach the requested SNA or NetBIOS system Once a router knows that a DLSw peer can reach a specific system the router can address frames directly to that peer and avoid unnecessary broadcast traffic on the TCP IP network 3 9 Configuring DLSw Services You typically define as configured peers e One slot in each DLSw capable remote Bay Networks router in your TCP IP network to which broadcast traffic must be forwarded e Any other RFC 1434 compliant peer in your TCP IP network You define each configured peer by its unique IP address on the TC
121. ou must set these parameters to allow the router to communicate with the SNA equipment Following is a brief description of the major parameters 3 12 DLSw Configuration Overview Clock Source Use this parameter when connecting the SNA equipment directly to the router Either the router or the SNA equipment can define the speed of the SDLC link You must configure one device to internal clocking and the other device to external clocking The Clock Source parameter identifies whether the router provides clocking INTERNAL or receives clocking EXTERNAL from the other device When connected to a modem set this parameter to EXTERNAL The attached modem provides the clocking for the connection Note When connecting the router directly to an SNA endstation the cables connecting these devices must connect the transmit pins of one device to the receive pins of the other Typically a DCE cable for the SNA equipment is connected to a Bay Networks Synchronous Passthrough cable Conversely an SNA DTE cable connects to a Bay Networks modem cable Internal Clock Speed Use this parameter to specify the speed of the line It is relevant only when Clock Source is set to INTERNAL Attached devices must be capable of operating at the specified speed Some of the more common allowed speeds for IBM products are as follows An IBM 3274 with an V 24 RS 232 interface supports up to 9600 bps Later models support speeds up t
122. ounting SRB LANs and Bridges cc cceeeceeeeeeeeeeeeeeeeaeeeeeeeeesaeeeeeeeeeseaeeeteneeesaas 2 2 Counting the IP Virtual Ring iese ee se ee ee Ak AA AR AA AA ee RA AG ee RA ee ee ee 2 3 Counting the Internal LAN AA 2 6 Counting the DLSw Bridge see ee ee AA AA Ge AA Ge AR AA Ge ee RA ee ee 2 7 Computing a DLSw Connection Path ie ee ee ee AA AA ee Ge AA ee ee ee 2 8 Parallel Data EER EE niet feng rece EE OE EE nets 2 9 Multiple D Gw Peers on a LAN ee RA Ge AA AR Ge AA AR ee RA ee RA ee ee ee ee ke ee 2 11 DLSw and Bridging Services iii ee ee AA Ge RA AA Ge ee RR AA ee de ee ee ee AA ee ee 2 11 DLSw on an SRB Circuit se RA RR AA AR ee Ge AA ee ee AA ee ee ee 2 11 DLSw on an Ethernet 802 3 Circuit ee ee AR AA ee ek AA ee ee ee 2 12 DLSw with Translation Bridge iese ee ee RR AA Ge AR AA AA AA ee ee AA ee ee ee 2 13 Memory Requirement see sis see ee punainen Rae EA ee ee Ge ee ae Ea ee ee ee 2 14 TGP Considerations EE te ais Le eae daa ete ee a el et 2 15 DESw Keepalive TIME EE atin eee A tii Al eae need 2 15 TCP Max Retransmission Timeout iese ese ee ee ee ee AA ee RA ee AR Re ee ee ke ee 2 16 Flow Control AR ER N RE AE EN eda N Aa 2 16 Bied Flow Control RE EN OE EE EE EE ER 2 17 TGPEIGWGONUOI EES IE DE DE N EE as GE Ge Ee is 2 17 Periormance ER ER EA EA ae 2 18 DLSW Packaging iese ee aa a Re r a ee ee ee ee 2 18 Chapter 3 DLSw Configuration Overview DLSw Session Set
123. ource or Destination SAP traffic filter criteria B 5 Configuring DLSw Services Table B 6 SAP Codes Description SAP Code XID or TEST 00 Individual Sublayer Mgmt 02 Group Sublayer Mgmt 03 SNA 04 08 OC IP 06 Proway Network Mgmt OE Novell and SDLC Link Servers 10 CLNP ISO OSI 20 34 BPDU 42 X 25 over 802 2 LLC2 7E XNS 80 Nestar 86 Active station list 8E ARP 98 SNAP Subnet Access Protocol AA Banyan VIP BC Novell IPX E0 CLNP ISO OSI EC IBM NetBIOS FO LAN Manager F4 F5 Remote Program load F8 UB FA IBM RPL FC ISO Network Layer FE LLC broadcast FF B 6 A actions traffic filter DLSw protocol prioritization 6 27 adding DLSw default MAC peer IP entries 5 39 DLSw default NetBIOS peer IP entries 5 33 DLSw local devices 3 14 DLSw peer IP entries 5 18 DLSw SAP entries 5 27 DLSw slot entries 5 22 address learning capabilities 3 15 3 16 MAC 3 15 peer IP 3 10 3 16 3 17 5 20 5 23 Bay Networks CompuServe forum xviii customer support xviii Home Page on World Wide Web xix InfoFACTS service xix publications ordering xxi Technical Response Center xx bridging services translation bridge 2 13 translation bridge on an SRB circuit 2 11 transparent bridge 2 12 to 2 13 broadcast peers 3 10 C Cable Type parameter 4 16 Canureach Retries parameter 4 24 5 52 Index Canureach Timer parameter 4
124. pe of the XID sending node This parameter is used with the IDBLOCK IDNUM and XID Format parameters to determine the station exchange identification XID value Choose either T2 0 or T2 1 N A IDBLOCK None 017 1061 any other 3 digit hexadecimal value Specifies the block number which must match the host s IDBLOCK parameter value that identifies incoming connection requests This parameter is used with the PU Type IDNUM and XID Format parameters to determine the station exchange identification XID value Obtain the configured value at the host from VTAM or other host operating system for this device In most cases Type 017 for a 3174 in T2 0 mode Type 061 for a T2 0 node in fixed format N A 5 48 Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Editing DLSw Parameters IDNUM None Any 5 digit hexadecimal value from 00000 to FFFFF for T2 0 nodes Specifies the ID number which must match the host s IDNUM parameter value that identifies incoming connection requests This parameter is used with the PU Type IDBLOCK and XID Format parameters to determine the station exchange identification XID value Obtain the configured value at the host from VTAM or other host operating system for this device Type a 5 digit hexadecimal value from 00000 to FFFFF for T2 0 nodes N A XID Format Non
125. peers in this router should allow Accept or disallow Reject TCP sessions with other DLSw peers not defined in the DLSw Peer Table Select Accept if you want to allow TCP sessions with Bay Networks or other DLSw peers not defined in the Peer Table Select Reject if you want to disallow TCP sessions with Bay Networks or other DLSw peers not defined in the Peer Table Disallowing TCP sessions prevents the router from learning the IP addresses of other peers in the network 1 3 6 1 4 1 18 3 5 1 5 1 13 5 10 Parameter Default Range Function Instructions MIB Object ID Editing DLSw Parameters Keepalive Time sec 60 s 0 to 2147483647 Specifies the time interval after which the router sends a DLSw keepalive message to inactive established TCP connections to verify that the connection is still available The keepalive time initiates standard TCP operation TCP operation determines the status of the TCP connection by receiving acknowledgments for transmitted data If TCP does not receive an acknowledgment for this data after a series of retransmission attempts it assumes that either a link or remote router is down TCP then reports this condition to DLSw This process can take approximately 20 minutes with default configurations To decrease the notification time for a lost link or a remote router decrease the TCP Max Retransmission Timeout parameter value Refer to Configuring TCP Services for information on
126. portions of the software were developed by the University of California Berkeley The name of the University may not be used to endorse or promote products derived from such portions of the software without specific prior written permission SUCH PORTIONS OF THE SOFTWARE ARE PROVIDED AS IS AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE In addition the program and information contained herein are licensed only pursuant to a license agreement that contains restrictions on use and disclosure that may incorporate by reference certain limitations and notices imposed by third parties Bay Networks Software License Note This is Bay Networks basic license document In the absence of a software license agreement specifying varying terms this license or the license included with the particular product shall govern licensee s use of Bay Networks software This Software License shall govern the licensing of all software provided to licensee by Bay Networks Software Bay Networks will provide licensee with Software in machine readable form and related documentation Documentation The Software provided under this license is proprietary to Bay Networks and to third parties from whom Bay Networks has acquired license rights Bay Networks will not grant any Software license whatsoever either explicitly or impl
127. ppropriate IP address add a new configured peer entry to the DLSw Peer IP Table See the preceding section Adding a DLSw Peer IP Table Entry Deleting a DLSw Peer IP Table Entry To delete a DLSw Peer IP Table entry start at the DLSw Peer Configuration window Figure 5 10 1 Select the entry to delete 2 Click on Delete TIETE TEE IE GE TE Apply alues Helpi Protocol GAIL dT EXHALED Hax Duce Buffers P Har Ducue Sime Figure 5 10 Deleting a DLSw Peer IP Table Entry 5 20 Editing DLSw Parameters The system software deletes the entry and the entry disappears from the list of configured peers 3 Click on Done The Configuration Manager window reappears Editing the DLSw Slot IP Table The DLSw Slot Configuration Table contains a list of all DLSw capable slots in your router Each table entry establishes a slot in the router as a DLSw peer on your TCP IP network You identify a slot by its number in the router chassis and a DLSw peer by its IP interface address on the TCP IP network DLSw Slot IP Table entries associate the number of a DLSw capable slot with the IP network address of that peer slot This section describes how to add edit and delete DLSw Slot IP Table entries Note Before you add any entries to the slot table you must add allocate one IP interface for each DLSw capable slot in the router configuration You need not configure the associated IP and DLSw interfaces on the
128. quests for this connection 1 3 6 1 4 1 18 3 5 1 5 12 1 14 4 24 Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Enabling DLSw Services SDLC Receive Credit 10 0 to 200 Specifies the maximum number of frames SDLC can send to DLSw This is a flow control parameter Enter the maximum number of frames you want SDLC to send to DLSw For example enter 1 if you want DLSw to accept 1 frame from SDLC before it updates the SDLC credit Enter 0 if you want DLSw to receive an infinite number of frames from SDLC without updating the SDLC credit 1 3 6 1 4 1 18 3 5 1 5 12 1 15 SDLC Transmit Credit 10 0 to 200 Specifies the maximum number of frames DLSw can send to SDLC Enter the maximum number of frames you want DLSw to send to SDLC For example enter 1 if you want DLSw to send only one frame to SDLC until it receives a credit update from SDLC Enter 0 if you want DLSw to send an infinite number of frames to SDLC without updating the SDLC credit 1 3 6 1 4 1 18 3 5 1 5 12 1 16 Subsequent DLSw Configuration If you have an existing DLSw configuration on your router configuring DLSw on other interfaces is simpler When you select DLSw on an Ethernet circuit no further steps are needed When you select DLSw on a Token Ring circuit the Source Routing Edit Interface window appears See Configuring Bridging Services for
129. ritization queues enter a dequeue list and receive a weighted score Packets with the lowest score are transmitted first By distributing the selection of packets from all queues weighted dequeuing generates less jitter than the round robin algorithms used for circuit level WAN protocol prioritization One goal of weighted dequeuing is to send smaller packets ahead of large packets without violating the bandwidth of each queue or starving large packets The algorithm accomplishes this by putting smaller packets ahead of larger packets by simultaneously considering how long the larger packets have been in the dequeue list A large packet accumulates credit lowering its weighted score as each smaller packet gets ahead of it and eventually the larger packet moves to the front of the dequeue list 6 4 Using DLSw Prioritization The Dequeue List Three factors determine a packet s weighted score e Size of the packet e Percent of bandwidth allocated to the packet s queue e Time spent in the dequeue list The dequeuing algorithm calculates a packet s dequeue weight using the following formula Size of packet Weight __ Time in dequeue list Bandwidth Weighted Dequeuing Algorithm Weighted dequeuing works as follows 1 Each priority queue enters its first oldest entry on a dequeue list 2 The dequeue list orders the packets according to a weighted score 3 TCP requests DLSw packets 4
130. rity parameter 6 13 6 21 DLSw SAP Configuration window 4 12 5 27 5 30 5 32 DLSw SAP Table parameters SAP 5 28 SAP Window 5 31 DLSw Slot Configuration window 4 8 5 22 5 24 5 25 DLSw Slot IP Table parameters IP Address 5 23 IP Address for TCP Connection 5 25 DLSw slot IP table parameters Slot 5 23 dual switch SDLC conversion 1 10 dual switch services 1 3 to 1 4 E Edit Circuits function editing DLSw interface parameters with 5 14 to 5 17 Edit Connector window 5 15 Edit DLSw Global Parameters window 5 4 Edit DLSw Interface window 5 16 editing DLSw Default MAC Peer IP Table parameters 5 38 to 5 44 DLSw Default NetBIOS Peer IP Table parameters 5 32 to 5 38 DLSw global parameters 5 3 to 5 12 DLSw interface parameters 5 13 to 5 17 DLSw local devices parameters 5 44 to 5 53 DLSw Peer IP Table parameters 5 17 to 5 21 DLSw SAP Table parameters 5 26 to 5 32 DLSw Slot IP Table parameters 5 21 to 5 26 template fit file 6 31 Enable global parameter 5 5 interface parameter 5 14 enabling DLSw services 4 1 to 4 26 Index 3 Ethernet 802 3 multiple DLSw peers serving a LAN 2 11 explorer frames 2 11 F filters DLSw inbound and outbound 1 13 flow control 2 17 configuration parameters for 4 25 5 29 5 53 LLC 2 17 TCP 2 17 Frame Relay Mapping Add window 4 6 Frame Relay Mappings window 4 5 Frame Relay support 1 11 to 1 12 G getting help from a Bay Networks Technical R
131. rsion Between single switch routers the LLC2 protocol is used NetBIOS Server Token Ring LLC EL e Backbone Network EL S ma Ethernet LLC2 Bay Networks Router LLC2 SNA Bay Networks Router Processor m Frame Relay 7 Only Token Ring le LLC 2 la LLC 2 lt LLC 2 or SDLC gt astra TEE EE eas See ee EE EE SoC ne ets gt Logical Connection Figure 1 3 Bay Networks Adjacent Single Switch Routers DLSw Dual Switch Services DLSw dual switch services allows SNA and NetBIOS traffic to share a multiprotocol backbone The DLSw standard specifies TCP IP as the standard transport mechanism for SNA and NetBIOS across an internetwork DLSw dual switch services uses TCP IP between routers unlike adjacent single switch routers using LLC2 DLSw dual switch services provides e IP routing permitting delivery over any available path e TCP services providing reliable data delivery reduced network overhead and flow control mechanisms to manage traffic 1 6 Data Link Switching Overview DLSw dual switch services is based on RFC 1434 This RFC defines the TCP IP control protocol Switch to Switch Protocol SSP used between DLSw devices Packets from a Token Ring Ethernet Frame Relay or SDLC network are carried to an attached B
132. s ee dee de ee ee Re ee ed ee ed ee de ee ee 5 44 DLSw Local Devices Parameter Descriptions iese ee ee AA ee ee AA ee ee 5 46 Deleting a DLSw Local Device Entry eise ee ee ee ee ee ee Re ee Ge ee ee ee AA ee ee ee 5 54 Editing DLSw Traffic Filters and Protocol Prioritization esse esse se se ee ee ee se ee 5 54 Deleting DLSw from the Node iese ee ee ee AA Ge RA AA Ge RR Ge RR Ge AA ee ee 5 54 Chapter 6 Using DLSw Prioritization Protocol Prioritization Overview iese ee ee RA Ge AA AR Ge AA AR ee ee AA ee ee ee RA ee ee ee ee 6 1 Two Types of Protocol PrioritiZation 6 2 BEA Priority QUEUES EE N N EE EE ER EE N 6 3 Default and Peer Specific DLSw Queues ee ee ek AA ee RA ee ee 6 3 Lhe Engueumng Process EE e EED DE ed Ee ger 6 3 Nonordered Queues ie RA AR AA AA AR AA AR ee ee AA ee ee ee ee 6 4 The Dequeuing Process ierre se ee Ee en Ge ee ee ee ee Ge ee AR Ge ee ee ee ee ee 6 4 The Bel Ad AE RE RO EE EE OE EN 6 5 Weighted Degueuing Algorithm ee ee se Re ee Re ee ee Re ee Ge Re ee ee Re ee ee 6 5 Tuning DLSw Protocol Prioritization 6 7 DLSw Priority Queues and Congestion Control 6 7 Q eue Depths EE EE tee N EE ein ee ee a ee ee Ge ge 6 7 Configuring Default Priority Queues iii se ee de AR ee Re ee ee AA ee ee ke ee ee ee 6 8 Enabling the Default Queues for Configured and Unconfigured Peers iese 6 9 viii Customizing the Default Queue Configuration iese ee ke AA ee 6
133. s in memory until the appropriate priority queue can handle them e Notify DLSw to stop and start the flow of packets There must be sufficient memory available to congestion control to prevent clipping The less the congestion the better the queue performance Queue Depth Using Site Manager parameters you configure the maximum queue buffers and the percentage of bandwidth for each queue Queue depth is the configurable number of packets that each DLSw priority queue can hold The default value is 50 packets regardless of packet size When you set the queue depth you assign buffers which hold the packets to the DLSw queues To determine whether there are enough buffers for the DLSw traffic flow on your network examine the following two protocol prioritization statistics which the router keeps for each DLSw priority queue e DLSw HiWater Packets Mark The greatest number of packets that have been in each queue e DLSw Congestion Control Count The number of packets the router has discarded from each queue The router discards packets from full priority queues Generally if a queue s Congestion Control Count is high and its HiWater Packets Mark is close to or equal to its queue depth you have not assigned enough buffers to that queue 6 7 Configuring DLSw Services Configuring Default Priority Queues You configure the default behavior of DLSw protocol prioritization using the Global DLSw PP Parameters Defau
134. same slot You can also use the circuitless IP interface address for a DLSw capable slot Using the circuitless IP interface allows TCP connections for DLSw services on that slot to be less dependent on the availability of specific physical circuits or datalinks For more information on the nature and use of the circuitless IP interface see Configuring IP Services To access the DLSw Slot IP Table begin at the Configuration Manager window refer to Figure 5 1 and select Protocols gt DLSw 7Slot IP Table The DLSw Slot Configuration window appears showing a list of all slots serving as DLSw peers on your TCP IP network Figure 5 11 5 21 Configuring DLSw Services Done Add Delete Apply Values Help Figure 5 11 DLSw Slot Configuration Window Adding a DLSw Slot IP Table Entry To add a new DLSw Slot IP Table entry begin at the DLSw Slot Configuration window Figure 5 11 and then 1 Click on Add The DLSw Slot Configuration window appears as shown in Figure 5 12 Lance Figure 5 12 IP Address in DLSw Slot Configuration Window 5 22 2 3 Editing DLSw Parameters Type a value for the Slot parameter Type the IP address of an interface configured earlier on the router Each DLSw capable slot requires its own IP interface in the router configuration Do not specify the same IP interface address for two or more different DLSw capable slots in the same router configuration Click on O
135. se Data Link Switches e Assign the same Virtual Ring IDs to each peer Taking these precautions prevents frames sent by one DLSw node from propagating through the other DLSw node on the same SRB LAN Note Do not configure multiple Data Link Switches on an Ethernet 802 3 LAN Ethernet 802 3 LANs do not support loop prevention through source routing DLSw and Bridging Services This section presents the different types of bridging services that coexist on a circuit with DLSw and explains any differences in TEST or explorer frame handling on these circuits This information is useful when you examine traffic on LANs locally attached to the router DLSw on an SRB Circuit On an SRB circuit with DLSw services enabled Figure 2 9 the following rules apply e Upon receiving an explorer frame that contains a DLSw specific destination SAP address DLSw and SRB attempt concurrently to locate the requested program entity DLSw searches the network for a route to the target system by forwarding the packet to all local DLSw interfaces and all known remote DLSw routers SRB looks for a bridged path to the target system using standard source route bridge broadcasts Configuring DLSw Services e DLSw or SRB whichever receives a response first takes precedence The slower subsystem ceases any further attempts to support a connection to the target program D D a 9 Local Source Route Bridged Path TCP IP Network
136. so that Ethernet endstations can accept the Token Ring traffic Note The IP Virtual Ring and Virtual Ring MTU parameters that appear in the DLSw Global Parameters window are primarily for compatibility with SRB networks locally attached to the router However Site Manager requires you to enter a value for the IP Virtual Ring even if you are configuring DLSw services on non SRB segments locally attached to the same router Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID MAC Cache Age 300 s Any number of seconds greater than 20 Specifies the maximum number of seconds that inactive MAC addresses can exist in the MAC to DLSw Peer mapping cache Enter an interval to limit the amount of memory that inactive MAC cache entries consume for DLSw services on the router 1 3 6 1 4 1 18 3 5 1 5 1 11 NetBIOS Cache Age 300 s Any number of seconds greater than 20 Specifies the maximum number of seconds that inactive NetBIOS names can exist in the NetBIOS to DLSw Peer mapping cache Enter an interval to limit the amount of memory that inactive NetBIOS cache entries consume for DLSw services on the router 1 3 6 1 4 1 18 3 5 1 5 1 12 5 9 Configuring DLSw Services Parameter Default Options Function Instructions MIB Object ID Reject Unconfigured Peers Accept Accept Reject Specifies whether DLSw
137. ss the network to the host Figure 1 5 Client Client EH Router Client TCP IP Network Figure 1 5 SDLC Conversion in a Single Switch Configuration In Figure 1 5 the SDLC clients appear to both the network and the Token Ring LAN attached host as if they were natively LAN attached Configuring DLSw Services Figure 1 6 illustrates a DLSw dual switch to switch network with SDLC clients using DLSw services at the local router to communicate over TCP IP with a remote host attached to a Token Ring LAN Client TCP IP Network Client Fa ez IL Modem Sharing Router Router Device SDLC Client Figure 1 6 SDLC Conversion in a Dual Switch to Switch Configuration In this example the local router performs the following operations e Terminates the SDLC sessions e Converts the SDLC traffic to DLSw Switch to Switch Protocol SSP format for TCP IP routing e Forwards the traffic to the remote router The DLSw remote router does the following e Converts the traffic to the appropriate format e Sends the traffic to the destination host In Figure 1 6 the SDLC clients appear to the network and to the Token Ring LAN attached host as if they were natively attached LAN devices Data Link Switching Overview
138. stomize the default queue configuration continue with the next section Customizing the Default Queue Configuration Configuring DLSw Services Customizing the Default Queue Configuration Once you enable DLSw protocol prioritization any DLSw peer uses default values that control how priority queues work You can change these values according to your network traffic needs Note The default priority queue configuration applies to all configured DLSw peers except those configured with a custom priority queue configuration Peer specific queue configurations take precedence over the default DLSw priority queue configuration Complete the following steps to edit the default DLSw protocol prioritization parameters 1 From the Configuration Manager window select Protocols gt DLSw gt Prot Prioritization Outbound Global refer to Figure 6 2 The Global DLSw PP Parameters Defaults window Figure 6 7 appears Global DLSw PP Parameters Defaults Cancel f OK Values Help Protocol Priority PP EISABLED PP for Unconfigured Peers ENABLED Max Queue Buffers for Unconfig Peers 50 Max Queue Size for Unconfig Peers 16000 Default Bandwidths Q0 01 Q9 60 40 0 0 0 0 0 0 0 0 Figure 6 7 Global DLSw PP Parameters Defaults Window 2 Edit the parameters you want to change using the descriptions following this procedure as guidelines 3 Click on OK when you are finished editing parameters 6
139. te endstation from a local endstation at this SAP address as follows 1 As frames are sent by the local endstation but not yet acknowledged by the remote endstation a counter on the remote DLSw switch increments 2 When this counter reaches half the value specified in the SAP Window parameter the remote DLSw switch sends a flow control indication back to the local DLSw switch 3 The local DLSw switch sends RNRs Receiver Not Ready to the local endstation to control the flow of the session 4 As frames are acknowledged by the remote endstation the counter on the remote DLSw switch decrements 5 After all outstanding frames have been acknowledged by the remote endstation the remote DLSw switch sends an end flow control indication back to the local DLSw switch 6 The local DLSw switch then sends RR Receiver Ready to the local endstation thereby allowing it to send more frames TCP Flow Control Each pair of TCP connections between DLSw peers carries data from many LLC2 sessions When congestion occurs on the TCP IP network between DLSw peers TCP Reduces or closes its transmit window Signals the local and remote LLC2 interfaces to assert flow control on any LLC2 connections associated with the congested TCP connections 2 17 Configuring DLSw Services Performance In a DLSw configuration that includes a single IP virtual ring the operation of three connection oriented protocol components two LLC2 and one TCP i
140. ter presents information about Data Link Switching DLSw as follows DLSw networking overview DLSw single and dual switch services SDLC support Frame Relay support DLSw filtering You should review this chapter if you are responsible for configuring DLSw on one or more Bay Networks routers If you are already familiar with DLSw concepts you can go directly to Chapter 2 DLSw Implementation Notes for more detailed information about DLSw on Bay Networks routers Configuring DLSw Services DLSw Networking Overview Data Link Switching DLSw provides a standards based mechanism for reliably transporting connection oriented SNA and NetBIOS data across a network Originally defined in RFC 1434 DLSw resolves the issues associated with transporting SNA and NetBIOS information across a multiprotocol backbone Specifically DLSw Prevents sessions from timing out due to slow network response time Automatically reroutes traffic around failed links Improves response time by reducing network overhead Enables multiple locations to interconnect without reconfiguring existing bridges Additionally Bay Networks DLSw implementation provides several benefits while retaining interoperability with other implementations of Data Link Switching These benefits include Bay Networks symmetric multiprocessor architecture providing a highly scalable and reliable implementation Advanced flow control ensuring that the router based network
141. th the Destination MAC the Token Ring or Ethernet host the local device will reach via SDLC services Consult your host system manager for the host SAP address Enter the Ox prefix followed by a 1 digit or 2 digit hexadecimal address 1 3 6 1 4 1 18 3 5 1 5 12 1 9 4 22 Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Enabling DLSw Services MAXOUT 7 1 to 127 Controls the maximum number of consecutive frames that an SDLC link station can send without acknowledgment Enter a value from to 127 1 3 6 1 4 1 18 3 5 1 7 5 1 10 MAXDATA 2057 265 521 1033 2057 Specifies the maximum frame size SDLC supports This value includes the Transmission Header TH and Request Header RH Enter a maximum frame size equal to or larger than the largest frame size that will be received 1 3 6 1 4 1 18 3 5 1 7 5 1 7 Canureach Timer 30 seconds s 0 to 3600 Specifies the time interval in seconds after which the router sends a canureach message to the remote DLSw peer to establish a session Enter the number of seconds you want for the time interval For example enter 1 to transmit a canureach message once per second or enter 3600 to transmit the message once per hour Enter 0 if you do not want to transmit a canureach message 1 3 6 1
142. the IP virtual ring first rather than last to avoid configuring source routing segments that already contain more than eight ring elements Figure 2 4 2 5 Configuring DLSw Services DLSw capable Bay Networks Router Source routing segment IP Virtual Ring n lt 3 2 __ Other segments masked by the IP Virtual Ring Figure 2 4 Counting the IP Virtual Ring Counting the Internal LAN Each DLSw capable Bay Networks router between an SRB LAN and the TCP IP network implements an internal LAN in the source routing bridge software Figure 2 5 2 6 DLSw Implementation Notes Token Ring Circuit Source routing bridge software DLSw software DEELEN EELER DLSw Bridge Bridge 1 IP Virtual Ring Token Ring Circuit Ring 1 Figure 2 5 Router Logical Considerations for DL Gw Support The internal LAN is not an actual network but you must account for it in topology calculations for SRB environments The internal LAN also has an associated ID that you enter when you configure the source routing bridge global parameters for DLSw operation Refer to Configuring Routers or Configuring Bridging Services for more information on the internal LAN ID Count the internal LAN only once per source routing segment Ensure that the Group LAN ID is the same for all Bay Networks routers in the same source routing segment Counting the DLSw Bridge Each DLSw peer in your n
143. the LLC2 Frame Relay Mappings window which now lists the selected circuit For more information on mapping DLCIs to MAC addresses refer to Configuring LLC Services Parameter DLC Default None Options Standard Data Link Connection Identifier DLCI numbers in hexadecimal format Function Provides the number of the virtual circuit to which the local or remote MAC address will be mapped Instructions Enter a hexadecimal DLCI number assigned by your system administrator MIB Object ID or Frame Relay provider 1 3 6 1 4 1 18 3 5 1 6 9 1 3 4 6 Parameter Default Options Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Enabling DLSw Services Remote MAC None Standard MSB Token Ring MAC addresses Provides the remote MAC address mapping outgoing requests for this MAC address corresponding to the DLCI value The Remote MAC address must be unique with only DLCI mapping for the specific MAC address Enter the remote MAC address of the host If you need to specify the real hardware address of the host enter it as an octal string 1 3 6 1 4 1 18 3 5 1 6 9 1 5 Local MAC None Standard MSB Token Ring MAC addresses Provides the local MAC address mapping incoming requests on this DLCI to that address The Local MAC address must be unique with only DLCI mapping for the specific MAC address Enter the MAC address of the recipient 1
144. the Max Retransmission Timeout parameter We recommend that the keepalive time interval setting be 30 seconds or greater Since only one packet is sufficient to initiate the TCP retransmission procedure short intervals will use additional memory and resources unnecessarily Type in the number of seconds you want for the keepalive time interval or type a 0 to disable the keepalive feature 1 3 6 1 4 1 18 3 5 1 5 1 16 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Maximum Package Size 1532 bytes 0 to 2147483647 Specifies the maximum package size in bytes when sending multiple DLSw frames in a single TCP frame for transmission over a wide area network Specify a value smaller than the TCP Window Size parameter and less than or equal to the Virtual Ring MTU size for the network minus the size of the TCP IP and MAC headers 1 3 6 1 4 1 18 3 5 1 5 1 23 Packaging Timeout 10 milliseconds ms 0 to 2147483647 Specifies the time interval in milliseconds to delay a package before sending it to TCP This value is based on the Packaging Threshold parameter The value should not be greater than the time it takes to send the number of outstanding bytes before packaging begins Type any positive integer in the range 0
145. to 2147483647 Values are in milliseconds 1 3 6 1 4 1 18 3 5 1 5 1 24 Packaging Threshold 20 percent of the TCP window size 0 to 100 percent 0 indicates no delay Specifies the percentage of the DLSw TCP window that must be in use if DLSw is to delay sending a package one that is currently being built Type a value in the range 0 to 100 percent A value of 20 percent indicates that if 20 percent of the TCP window size is being used DLSw issues the delay as specified by the Packaging Timeout parameter 1 3 6 1 4 1 18 3 5 1 5 1 25 5 12 Editing DLSw Parameters Enabling a DLSw Interface You can use the Configuration Manager to enable or disable a DLSw interface on a specific circuit To access the DLSw interface parameters from the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw7 Interfaces The DLSw Interface Configuration window appears Figure 5 3 E DLSu Interface Configuration S51 11c2 a Delete Apply Values Help pod WEE A Enable ENABLE Figure 5 3 DLSw Interface Configuration Window 2 Select an interface from the list The interfaces appear in the form circuit name Je 3 Change the setting of the Enable parameter if necessary Refer to the parameter description that follows this procedure 4 Click on Apply to save your change 5 Click on Done The Configuration Manager window reappears 5 13 Configuring DLSw Servic
146. tocol prioritization for unconfigured peers Set to Disable if you want to temporarily disable all protocol prioritization activity Set to Enable if you previously disabled protocol prioritization and now want to re enable it 1 3 6 1 4 1 18 3 5 1 5 1 20 6 13 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Parameter Default Range Function Instructions MIB Object ID Max Queue Buffers for Unconfig Peers 50 10 to 2147483647 packets Specifies the maximum number of packets in each default queue Enter a number of packets to increase or decrease the default buffer size of 50 packets 1 3 6 1 4 1 18 3 5 1 5 1 21 Max Queue Size for Unconfig Peers 16000 5000 to 2147483647 bytes Specifies the maximum size of each default queue Enter a number of bytes to increase or decrease the default queue size of 16000 bytes 1 3 6 1 4 1 18 3 5 1 5 1 22 Default Bandwidths 60 40 0 0 0 0 0 0 0 0 Ten entries one per queue of a percentage between 0 and 100 Determines the number of default queues and allocates the bandwidth for each Either accept the default of 60 percent in Queue Number zero QO and 40 percent in queue number one Q1 or enter up to 10 values one for each queue Separate each bandwidth percent with a comma The bandwidth percentages must total 100 O
147. tp www baynetworks com One of the menu items on the Home Page is the Customer Support Web Server which offers technical documents software agents and an E mail capability for communicating with our technical support engineers How to Get Help For additional information or advice contact the Bay Networks Technical Response Center in your area United States Valbonne France Sydney Australia Tokyo Japan Conventions 1 800 2LAN WAN 33 92 966 968 61 2 903 5800 81 3 328 005 This section describes the conventions used in this guide angle brackets lt gt arrow character gt bold text brackets italic text quotation marks screen text Indicate that you choose the text to enter based on the description inside the brackets Do not type the brackets when entering the command Example if command syntax is ping lt ip_address gt you enter ping 192 32 10 12 Separates menu and option names in instructions Example Protocols gt AppleTalk identifies the AppleTalk option in the Protocols menu Indicates text that you need to enter and command names in text Example Use the dinfo command Indicate optional elements You can choose none one or all of the options Indicates variable values in command syntax descriptions new terms file and directory names and book titles Indicate the title of a chapter or section within a book Indicates data that appears on the scree
148. trol in Chapter 2 for more information Type a SAP window size that is appropriate for your network configuration and requirements Specifying a larger size dedicates more buffer space to a particular SAP thereby improving performance on that SAP Specifying a smaller window size reduces buffer size and decreases performance on that SAP 1 3 6 1 4 1 18 3 5 1 5 4 1 3 Note The default value of 10 frames is based on the commonly used value of 7 frames plus additional frames to accommodate possible differences in timing between the router and the endstations Deleting a DLSw SAP Table Entry To delete a SAP table entry begin at the Configuration Manager window refer to Figure 5 1 1 Select Protocols gt DLSw SAP Table This displays the DLSw SAP Configuration window Figure 5 18 Select the SAP Table entry to delete Click on Delete The system software deletes the entry you selected and the entry disappears from the DLSw SAP Configuration window 5 31 Configuring DLSw Services Done Add Delete Apply Values Help jol WEE ah SAP Window Figure 5 18 Deleting a SAP Table Entry 4 Click on Done This completes the deletion procedure and returns you to the Configuration Manager window Editing DLSw Default NetBIOS Peer IP Table Parameters The Default NetBIOS Peer IP Table contains the list of all remote NetBIOS systems and applications you can access via DLSw connection services on
149. ts 3 1 Configuring DLSw Services e Upon receiving aCANUREACH frame a DLSw slot Forwards the frame to all other slots defined in this router s DLSw Slot Table Converts the CANUREACH frame back to a TEST POLL frame Forwards the TEST POLL frame to all interfaces on this slot which have DLSw enabled e Ifthe destination device resides on an attached LAN then this device responds by broadcasting a TEST RESPONSE message Upon receiving this response the remote router Caches the MAC address for SNA or name for NetBIOS in the appropriate table on the router Converts the TEST RESPONSE packet into a DLSw ICANREACH frame Forwards the ICANREACH to the originating data link switch router e Upon receiving the ICANREACH the originating router Caches the MAC address or NetBIOS name and identity of the remote router in the appropriate table on the router Converts the ICANREACH back to a TEST RESPONSE frame Forwards the packet to the originating workstation At completion all routers and endstations can forward SNA and NetBIOS packets appropriately creating a logical session between endpoints Each slot on a Bay Networks running DLSw functions as an independent Data Link Switch The network administrator controls the packets forwarded to DLSw by specifying the appropriate SAPs in the DLSw SAP Table Site Manager Roadmaps to Configuring DLSw Figures 3 1 and 3
150. tual Ring Default None Options Any valid unassigned ring number from 1 to 409519 0x0001 to OxOFFF Function Specifies a virtual ring number for the TCP IP network Instructions Type any valid ring number The number must be e Unique among any other ring IDs group LAN IDs or internal LAN IDs assigned in the network e The same as the virtual ring number used by all other DLSw peers on the same TCP IP network Entering a value for this mandatory parameter prepares the router for DLSw services on Token Ring 802 5 circuits Enter a value even if you are presently configuring DLSw services on Ethernet 802 3 circuits only MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 1 5 Note The IP Virtual Ring and Virtual Ring MTU parameters that appear in the DLSw Global Parameters window are primarily for compatibility with SRB networks locally attached to the router However Site Manager requires you to enter a value for the IP Virtual Ring even if you are configuring DLSw services on non SRB segments locally attached to the same router 5 7 Configuring DLSw Services Parameter Default Range Function Instructions MIB Object ID Parameter Default Options Function Instructions MIB Object ID Max Slot Sessions 200 sessions per slot 1 to 10000 Specifies the maximum number of LLC2 sessions that a given slot in the router can support for DLSw requirements Specifying more sessions per slot has the effect of
151. ueue Configuration PP Queues DLS Priority Outbound Filters PP Filters gt Dirt isc Weslo MEE Defeult Queues Bends ithe eo Cee Feu tt Queues Bernice pith efa lt hiers Honde this Protocol Priority Hae Dime Zkuf eroa Has Dunn Size Figure 6 23 DLSw Peer Configuration Window 6 30 Using DLSw Prioritization Sample Templates for DLSw Protocol Prioritization In addition to using the Configuration Manager screens described in this guide to configure traffic filter templates you can also edit or copy a traffic filter template using a text editor The Configuration Manager stores all templates for all protocols in the file usr wf template template fit Included with the software is a template fit file that contains two sample DLSw protocol prioritization templates you can use for differentiating SNA and NetBIOS traffic To use the sample templates copy usr wf template template fit to the directory from which you start Site Manager your Site Manager working directory If that directory already contains a template fit file copy the contents of the latest file into your existing file The sample templates place SNA traffic in the default queue QO and NetBIOS traffic in Q1 Using the default queue configuration QO receives 60 percent of bandwidth and NetBIOS receives 40 percent of bandwidth The section Creating DLSw Priority Filters in this chapter lists the steps for creating filters from these or simil
152. ueue Configuration Window iese Re AR AA ee ee 6 16 Add Edit Delete Queues WiNdOW ee ee Re RA RA ER RA RA ee ee 6 17 Add Queue Window ie ee ee ee Re AR AR RA RA ER AA GR ee ee 6 17 Configured QUEUES ee ee ee ee ee RA ee ee RA ee ee RA ee ee ee ee 6 18 Peer Queue Configuration Window with Both Default and Peer Specific Configurations cccccceseseeeceeeeeeeeeeeseeeeeeeeeeseenees 6 19 Peer Queue Configuration Window ie ee ee AR AA ee ee 6 20 Selecting the DLS Priority Outbound Filters Window eie see ee 6 22 DLS Priority Outbound Filters WindOW iese ee ee se Re AA ee ee 6 23 Filter Template Management WiNdOW iese ee ee ee ee 6 24 Selecting a Predefined D Gw Outbound Filter Criterion ese 6 25 Selecting the DLSw Queue Action 0 0 ee ee AA ee RA Ge AA ee 6 26 Queue Number Window 6 27 Create Filter Window 0 cccceeceeeeeseeeeeeeeeeeeaeeeeeeeeeeaaeeeseaeeeseaeeeeeaeeeeaees 6 28 DLS Priority Outbound Filters Window with Configured Fllters 6 29 DLSw Peer Configuration Window ee ee Re Ge AA ee ee 6 30 xiii Table 5 1 Table A 1 Table A 2 Table A 3 Table A 4 Table A 5 Table A 6 Table A 7 Table A 8 Table A 9 Table B 1 Table B 2 Table B 3 Table B 4 Table B 5 Table B 6 Tables Customizing the DLSw Support Protocols iese ee ee ee ee AA ee 5 2 DLSw Global Parameters ees sees ee ee ER ee ee ee ee ee ee Ee RR Re ee ee
153. und Filters window for WAN protocols Figure 6 17 Filter Template Management Window The software includes sample templates for filtering NetBIOS and SNA traffic NetBIOS Oueuel and SNA Oueue0 shown in Figure 6 17 The sample templates place SNA traffic in QO and NetBIOS traffic in Q1 Unless you have customized the default queue configuration QO SNA receives 60 percent of bandwidth and Q1 NetBIOS receives 40 percent of bandwidth Using the remaining steps in this section you can create filters from these or similar templates To use the sample templates copy the file usr wf template template fit to the directory from which you start Site Manager your Site Manager working directory If that directory already contains a template fit file rename the existing file or copy the contents of the template fit file into your template fit existing file Decide whether to create a new template or use an existing template More often than not you can use an existing filter template to build a new one Ifno existing template matches your needs create a new filter template Tocreate a template similar to an existing one copy the existing template to preserve the original template to a new template with the same criteria and actions Then edit the new template 6 24 Using DLSw Prioritization To modify an existing template without preserving the original template edit the existing template Note that changing a t
154. unique IP address is not available you must perform one of the following tasks e For configurations that do not have as many physical IP interfaces as DLSw slots add multiple IP addresses to a single physical interface For example you might want to do this in large SDLC configurations since IP cannot be configured on SDLC interfaces For more information on configuring multiple IP addresses see Configuring IP Services e For single switch operation enter any valid IP address that is available but not used in your network This address should be on a unique IP subnet Note You can use the circuitless IP interface address for one and only one DLSw capable slot Using the circuitless IP interface allows TCP connections for DLSw services on that slot to be less dependent on the availability of specific physical circuits or data links We recommend that you set the Keepalive Time parameter to a nonzero value when using the circuitless IP address For more information on the circuitless IP interface refer to Configuring IP Services Figure 3 4 shows a sample network with three routers running DLSw Although many options exist for the Slot Table this network uses the following values in the Slot Tables e Router A the central site router has three slots running DLSw as follows For Slot 1 the circuitless IP address is used in the Slot Table to represent this slot This provides the highest availability for Token Ring devices
155. up OVErview ee ee Re AA Ge AA Ge AA Re ee AA ee AR RA ee ee de ee 3 1 Site Manager Roadmaps to Configuring DLSW iese see ee ee ee AA AR ee AA AR ee 3 2 Configuration Objects for Single Switch DU w e 3 5 MIER TEE 3 5 DLSW Slot Table se EE eect tain ee Ate Pea ae ie ae 3 6 Configuration Objects for Dual Switch DLSW iese see Ge AA AA Ge AA AR ee AA ee Re ee 3 8 DEAT Peer RE EER EE OE EE NE 3 9 Contiguted aI N EE OE EN 3 9 Simplifying the Peer IP Table iii ese ee ee RA Ge AA Re AA AA ee ee AA ee ee 3 10 Broadcasi ERA AA EA OER OE EE OR DE 3 10 Vi Unconngured POSTS cerea RE EE EE EE E 3 10 Configuration Objects for SDLC ee ee Ge RR Ge AA ee Ge ee ee 3 12 SDLG Line Parameters ii HR GEE EYE Ge ee ee Ys Ge ves De EE RS a RR OE es us ieee 3 12 Beie 3 14 Optional Configuration Objects se se ee RA ee Re Ge ee ee AA ee ee ee 3 15 Dynamically Learned Remote Systems issie se ee ee Ge AA ee ee ee AA ee ee 3 15 Statically Defined Remote Systems ii iese ee Ge AA ee Ge AA ee ee ee AA ee ee 3 16 Chapter 4 Enabling DLSw Services Enabling DLSw on an Interface ie ee ee ee AA Ge AA Ge AA ee ee AA ee RR ee ee ee ee 4 1 Configuring DL Gw the First Time c ccccceceeceseeeeeeeeeeeeeeeseeeeeeeaaeeseeeeeecaaeeeseeeeessaeeeseneees 4 2 Setting the DLSw Global Parameters cccccccseceeeeeeeeeeeeeeeeeeeseaeeeeeeeeetsaeeeseeeeeaas 4 2 Specifying Source Routing Bridge Encapsulation iese sesse ee se ee
156. ust match other entries in the router or in the attached SDLC device These include Link Address hex This parameter must match the polling address defined in the SDLC attached device PU Type This parameter must match the PU type of the SDLC attached device For some devices this is a fixed value For example the IBM 3274 is a PU2 0 while the IBM 5494 is a PU 2 1 For other devices it is explicitly defined For example the IBM 3174 can be configured as PU 2 0 or PU 2 1 IDBLOCK and IDNUM These parameters required for PU 2 0 devices only must match the same values on the host The 3 digit IDBLOCK and the 5 digit IDNUM may be defined on the host as a single 8 digit XID XID Format This parameter is typically set to FIXED for PU 2 0 devices and set to NEGOTIABLE for PU 2 1 devices 3 14 DLSw Configuration Overview Source Host MAC hex This parameter must be defined in the LAN gateway when using an IBM 3174 or compatible gateway Other gateways typically do not define this value Destination Host MAC hex This parameter must match the MAC address of the LAN gateway using MSB Token Ring format Source Virtual SAP hex and Destination Host SAP hex These parameters must be entered into the SAP Table of the source and destination routers Both parameters default to 04 This value is included in the default SAP Table For each local device you add Site Manager creates a corresponding SDLC
157. window Instructions Type the IP address of the DLSw peer that can reach the remote client server or application currently selected in the DLSw NetBIOS Peer Configuration window The router adds this IP address to the list of configured peers in the local DLSw Peer IP Table MIB Object ID 1 3 6 1 4 1 18 3 5 1 5 11 1 3 Deleting a DLSw Default NetBIOS Peer IP Table Entry To delete a DLSw Default NetBIOS Peer IP Table entry from the router configuration start at the DLSw NetBIOS Peer Configuration window Figure 5 22 1 Select the table entry to delete 5 37 Configuring DLSw Services Delete Apply Values Help jl Default NetBios Peer IP Address 198 42 61 5 IE Figure 5 22 Deleting a DLSw Default NetBIOS Peer IP Table Entry 2 Click on Delete The system deletes the entry you selected and the entry disappears from the list 3 Click on Done You return to the Configuration Manager window Editing DLSw Default MAC Peer IP Table Parameters The DLSw Default MAC Peer IP Table contains the list of all remote SNA systems and applications you can access via DLSw connection services on the local router Each entry you define in the DLSw Default MAC Peer IP Table contains the IP address of a remote DLSw peer that can reach a target SNA system or application The target system or application has an associated Token Ring 802 5 MAC address which you also specify in the DLSw Default MAC Peer IP Table
158. ype a name for the filter in the Filter Name box Highlight All DLSw Peers to apply this template to all configured peers or select an individual peer from the Interfaces scroll box Select the template you want to apply from the Templates scroll box Click on OK The DLS Priority Outbound Filters window reappears with the new filter displayed in the scroll box Figure 6 22 Repeat Steps 11 through 15 to apply other templates 6 28 Using DLSw Prioritization Each entry in the filter scroll box lists the filter number filter name and IP address of the affected DLSw peer Filters that apply to all DLSw peers appear with IP address 0 0 0 0 Site Manager numbers the filters for each peer interface chronologically E DLS Priority Outbound Filters DLS 1 SNA_Q1_all DLS 2 netbios_Q2_all e l Apply DLS 1 FID type Log stele Done Template Create Edit Reorder Delete Values Help Filter Enable ENABLED Filter Name FID_type_Log Figure 6 22 DLS Priority Outbound Filters Window with Configured Filters 6 29 Configuring DLSw Services Using the DLSw Peer Configuration Window In addition to using the menu selections shown in this section you can access the DLSw Protocol Prioritization windows directly from the DLSw Peer Configuration window Figure 6 23 To Access This Window Click on This Button in the DLSw Peer Configuration Window Global DLSw PP Parameters Defaults PP Global Peer Q

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